{"title":"AC Series Amplifiers","description":"","products":[{"product_id":"aunex-ac1800kd1-class-d-monoblock-amplifier-1800w-rms","title":"AC1800KD1","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Class-D Monoblock · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1800\u003cspan class=\"red\"\u003eKD1\u003c\/span\u003e — 1800W RMS\u003cbr\u003eClass-D Monoblock Car Amplifier | 1-Ohm Stable\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1800KD1 is a compact, full-power Class-D monoblock amplifier engineered for high-output subwoofer systems where verified performance matters. Rated at \u003cstrong\u003e1,800 watts RMS at 1 ohm\u003c\/strong\u003e — not peak, not burst — every unit is independently lab-tested at rated power before it ships. What's on the spec sheet is what comes out of the terminals.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS Power\u003c\/h3\u003e\n \u003cp\u003eUnlike inflated peak-power ratings common in the car audio market, the AC1800KD1 is rated under real-world operating conditions: 14.4V DC, full bandwidth, both channels driven. 1,800W at 1Ω. 1,200W at 2Ω. 650W at 4Ω. No asterisks. No fine print. Just the power we promised.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e1-Ohm Mono Stable — By Design\u003c\/h3\u003e\n \u003cp\u003e1-ohm stability is built into the AC Series topology, not a premium feature. Drive your subwoofer at a 1-ohm load without thermal derating, current limiting, or protection-circuit interference. Class-D efficiency means the compact chassis stays cool under extended high-power operation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most car amplifiers use a 2-layer PCB, the AC1800KD1 is built on a 4-layer surface-mount design. Additional copper layers reduce power-plane impedance, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over time.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eUniversal Source Compatibility\u003c\/h3\u003e\n \u003cp\u003eZero-Point Balanced inputs (CMRR architecture) reject common-mode noise from vehicle electrical systems. Input sensitivity spans 400mV to 20V — compatible with factory OEM head units via high-level input, aftermarket receivers, and DSP processors. No additional adapter required in most installations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eComplete Tuning Control\u003c\/h3\u003e\n \u003cp\u003eVariable low-pass crossover (50–250Hz, 24dB\/octave), subsonic filter (10–50Hz), bass boost (0–18dB @ 45Hz), phase switch (0°\/180°), and an LED clipping indicator for real-time distortion monitoring during setup. Remote bass knob included in the box — not a $30 accessory.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n \u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load. Ready to configure and mount from day one.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e1800W RMS Monoblock\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eClass-D Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1-Ohm Stable Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eSubwoofer Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCompact Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCategory ID: 3583\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":44821119467617,"sku":"AC1800KD1","price":569.99,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac800kd1-class-d-monoblock-amplifier-800w-rms","title":"AC800KD1","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Class-D Monoblock · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC800\u003cspan class=\"red\"\u003eKD1\u003c\/span\u003e — 800W RMS\u003cbr\u003eClass-D Monoblock Car Amplifier | 1-Ohm Stable\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC800KD1 is a compact, full-power Class-D monoblock amplifier built for high-output subwoofer systems in space-constrained installs. Rated at \u003cstrong\u003e800 watts RMS at 1 ohm\u003c\/strong\u003e — not peak, not burst — every unit is independently lab-tested at rated power before it ships. At just 6.71″ in length, it delivers serious subwoofer performance without sacrificing trunk real estate.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS Power\u003c\/h3\u003e\n \u003cp\u003eUnlike inflated peak-power ratings common in the car audio market, the AC800KD1 is rated under real-world operating conditions: 14.4V DC, full bandwidth, both channels driven. 800W at 1Ω. 500W at 2Ω. 300W at 4Ω. No asterisks. No fine print. Just the power we promised.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e1-Ohm Mono Stable — By Design\u003c\/h3\u003e\n \u003cp\u003e1-ohm stability is built into the AC Series topology, not a premium feature. Drive your subwoofer at a 1-ohm load without thermal derating, current limiting, or protection-circuit interference. Class-D efficiency means the compact chassis stays cool under extended high-power operation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eCompact Build. Full-Power Output.\u003c\/h3\u003e\n \u003cp\u003eAt 5.70″ wide and just 6.71″ long, the AC800KD1 fits where larger monoblocks cannot — under seats, in shallow trunk compartments, and custom enclosure panels — without compromising output. The 4-layer SMD PCB delivers the structural rigidity and thermal performance of a full-size build in a significantly smaller footprint.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eUltra-Low Noise Floor — \u0026gt;105 dB S\/N\u003c\/h3\u003e\n \u003cp\u003eWith a signal-to-noise ratio exceeding 105 dB, the AC800KD1 delivers a dead-silent background between bass hits. Zero-Point Balanced inputs (CMRR architecture) reject alternator whine and ignition interference at the point of entry. Input sensitivity spans 250mV to 10V, compatible with factory OEM head units and aftermarket processors alike.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eComplete Tuning Control\u003c\/h3\u003e\n \u003cp\u003eVariable low-pass crossover (50–250Hz, 24dB\/octave), subsonic filter (10–50Hz), bass boost (0–18dB @ 45Hz), phase switch (0°\/180°), and an LED clipping indicator for real-time distortion monitoring during setup. Remote bass knob included in the box — not a $30 accessory.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n \u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load across the AC800KD1’s compact form factor. Ready to configure and mount from day one.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e800W RMS Monoblock\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eClass-D Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1-Ohm Stable Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCompact Monoblock Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eSmall Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eSubwoofer Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45039734718561,"sku":"AC1800KD1","price":569.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0618\/0785\/3665\/files\/IMG_1072.jpg?v=1779496378"},{"product_id":"aunex-ac1200kd1-class-d-monoblock-amplifier-1200w-rms","title":"AC1200KD1","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Class-D Monoblock · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1200\u003cspan class=\"red\"\u003eKD1\u003c\/span\u003e — 1200W RMS\u003cbr\u003eClass-D Monoblock Car Amplifier | 1-Ohm Stable\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1200KD1 is a compact, full-power Class-D monoblock amplifier built for high-output subwoofer systems where verified performance matters. Rated at \u003cstrong\u003e1,200 watts RMS at 1 ohm\u003c\/strong\u003e — not peak, not burst — every unit is independently lab-tested at rated power before it ships. What’s on the spec sheet is what comes out of the terminals.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS Power\u003c\/h3\u003e\n \u003cp\u003eUnlike inflated peak-power ratings common in the car audio market, the AC1200KD1 is rated under real-world operating conditions: 14.4V DC, full bandwidth, both channels driven. 1,200W at 1Ω. 700W at 2Ω. 400W at 4Ω. No asterisks. No fine print. Just the power we promised.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e1-Ohm Mono Stable — By Design\u003c\/h3\u003e\n \u003cp\u003e1-ohm stability is built into the AC Series topology, not a premium feature. Drive your subwoofer at a 1-ohm load without thermal derating, current limiting, or protection-circuit interference. Class-D efficiency means the compact chassis stays cool under extended high-power operation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most car amplifiers use a 2-layer PCB, the AC1200KD1 is built on a 4-layer surface-mount design. Additional copper layers reduce power-plane impedance, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over time.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eUniversal Source Compatibility\u003c\/h3\u003e\n \u003cp\u003eZero-Point Balanced inputs (CMRR architecture) reject common-mode noise from vehicle electrical systems. Input sensitivity spans 400mV to 20V — compatible with factory OEM head units via high-level input, aftermarket receivers, and DSP processors. No additional adapter required in most installations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eComplete Tuning Control\u003c\/h3\u003e\n \u003cp\u003eVariable low-pass crossover (50–250Hz, 24dB\/octave), subsonic filter (10–50Hz), bass boost (0–18dB @ 45Hz), phase switch (0°\/180°), and an LED clipping indicator for real-time distortion monitoring during setup. Remote bass knob included in the box — not a $30 accessory.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n \u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load at the AC1200KD1’s compact 8.28″ chassis length. Ready to configure and mount from day one.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e1200W RMS Monoblock\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eClass-D Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1-Ohm Stable Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eSubwoofer Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCompact Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043765837921,"sku":null,"price":569.99,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac1500k6-6-channel-car-amplifier-150w-rms","title":"AC1500K6","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\u003csection class=\"seo-card\"\u003e\n\u003cdiv class=\"seo-card-inner\"\u003e\n\u003c!-- LEAD --\u003e\n\u003cdiv class=\"seo-lead\"\u003e\n\u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Full-Range Digital 6-Channel · 2026 Edition\u003c\/span\u003e\n\u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1500\u003cspan class=\"red\"\u003eK6\u003c\/span\u003e — 150W × 6 RMS\u003cbr\u003e6-Channel Car Amplifier | Bi-Amp Ready\u003c\/h2\u003e\n\u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1500K6 is a full-range digital 6-channel amplifier built for front-stage systems that demand proper bi-amplification. Rated at \u003cstrong\u003e150 watts RMS per channel at 4 ohms\u003c\/strong\u003e — all six channels, independently verified — it delivers uniform power across your entire speaker system. Run four channels in a true bi-amp configuration across your front stage and dedicate the remaining two to rear fill. This is how a proper system is built.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- BODY BLOCKS --\u003e\n\u003cdiv class=\"seo-body\"\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003eIndependently Verified RMS — All 6 Channels\u003c\/h3\u003e\n\u003cp\u003e150W RMS per channel at 4Ω. 225W per channel at 2Ω. 450W per channel bridged at 4Ω across 3 pairs. Every output independently tested — no leading channel, no weak channel. What’s on the spec sheet is what comes out of all six terminals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003eTrue Bi-Amp Configuration\u003c\/h3\u003e\n\u003cp\u003eSerious front staging requires separate amplification for tweeters and mid-bass drivers — each channel tuned to what it’s moving. The AC1500K6’s 6-channel layout enables a full bi-amp front stage with independent HPF and LPF crossovers (40–400Hz, 18dB\/octave) per channel pair, delivering a stage that’s cleaner, wider, and more controlled than any 4-channel can produce.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003e2CH \/ 6CH Input Switch\u003c\/h3\u003e\n\u003cp\u003eA single front-panel switch selects between 2-channel and 6-channel input modes, making the AC1500K6 compatible with both aftermarket head units and OEM source units with a DSP processor. Input sensitivity spans 400mV to 20V — no additional line-output converter required in most installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n\u003cp\u003eWhere most multi-channel amplifiers at this price point use a 2-layer PCB, the AC1500K6 is built on a 4-layer surface-mount design. Additional copper layers reduce power-plane impedance across all six output stages, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003eBridge Mode — 450W × 3\u003c\/h3\u003e\n\u003cp\u003eWhen the install calls for it, any channel pair on the AC1500K6 can be bridged to deliver 450W RMS into a 4Ω load — turning the 6-channel into three high-power outputs. Use all three bridged pairs for a compact subwoofer-ready multi-driver system, or mix bridged and stereo channels for a custom staging configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"seo-block\"\u003e\n\u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n\u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load across all six output channels at the AC1500K6’s 86% efficiency rating. Ready to configure from day one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- KEYWORD TAGS --\u003e\n\u003cdiv class=\"seo-tags\"\u003e\n\u003cspan class=\"seo-tag\"\u003e6-Channel Car Amplifier\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003e150W x 6 RMS\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003eBi-Amp Car Amplifier\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003eFull-Range Amp\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003eMulti-Channel Amplifier\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043954712673,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac1600k5-5-channel-car-amplifier-800w-sub-125w-x4","title":"AC1600K5","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Hybrid Full-Range Digital 5-Channel · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1600\u003cspan class=\"red\"\u003eK5\u003c\/span\u003e — 800W Sub + 125W × 4\u003cbr\u003e5-Channel Car Amplifier | Full System. One Amp.\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1600K5 is a hybrid full-range digital 5-channel amplifier that powers your entire car audio system from a single compact chassis. A dedicated \u003cstrong\u003e800W RMS subwoofer channel at 1 ohm\u003c\/strong\u003e pairs with \u003cstrong\u003e125W RMS per channel across four full-range outputs\u003c\/strong\u003e — front stage, rear fill, and sub, all independently verified, all in one install. Less wiring. Less space. No compromise on output.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eOne Amp. Complete System.\u003c\/h3\u003e\n \u003cp\u003eMost builds require two amplifiers — one for the stage, one for the sub. The AC1600K5 eliminates that. A single chassis handles front stage (CH1–CH2), rear fill (CH3–CH4), and a dedicated 1-ohm stable subwoofer channel (CH5) with 800W RMS. One power run. One signal chain. One install done right.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e800W Sub Channel — 1-Ohm Stable\u003c\/h3\u003e\n \u003cp\u003eCH5 is a purpose-built subwoofer output rated at 800W RMS at 1Ω, 500W at 2Ω, and 300W at 4Ω — independently verified under real-world conditions. Run a single 1-ohm DVC subwoofer without derating or thermal runaway. A 24dB\/octave low-pass crossover (50–250Hz), subsonic filter (10–50Hz), and 0–18dB bass boost at 45Hz give CH5 full dedicated tuning control.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e125W × 4 Full-Range Channels\u003c\/h3\u003e\n \u003cp\u003eCH1–CH4 deliver 125W RMS per channel at 4Ω and 200W at 2Ω — all four channels driven simultaneously, all independently verified. Bridge any pair for 400W RMS into a 4Ω load. An independent HPF crossover (40–400Hz, 18dB\/octave) per channel pair keeps tweeters, mid-bass, and rear fill tuned correctly without a separate DSP.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e2CH \/ 5CH Input Switch\u003c\/h3\u003e\n \u003cp\u003eA front-panel input switch selects between 2-channel and 5-channel input modes, making the AC1600K5 compatible with both standard aftermarket head units and OEM source units running through a DSP processor. Input sensitivity spans 250mV to 10V — no additional line-output converter required in most OEM integrations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most 5-channel amplifiers at this price point use a 2-layer PCB, the AC1600K5 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all five output stages, improve thermal dissipation, and deliver the structural rigidity needed to survive road vibration over the long term.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n \u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load across all five channels simultaneously. Remote bass knob ships in the box, ready to install from day one.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e5-Channel Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e800W Subwoofer Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eHybrid 5-Channel Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eFull System Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1-Ohm Sub Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e125W x 4 RMS\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043955105889,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac600k4-4-channel-car-amplifier-100w-rms","title":"AC600K4","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Compact Full-Range Digital 4-Channel · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC600\u003cspan class=\"red\"\u003eK4\u003c\/span\u003e — 100W × 4 RMS\u003cbr\u003e4-Channel Car Amplifier | One Honest Number.\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC600K4 is a compact full-range digital 4-channel amplifier that delivers \u003cstrong\u003e100 watts RMS per channel at 4 ohms\u003c\/strong\u003e — independently tested, not claimed. Most 4-channel amplifiers at this price point overstate output, spread peak-rated watts across four channels, and leave your drivers working harder than they should. The AC600K4 does not. Four channels. One verified standard. No combined peak totals. No fine print. Bridge any pair for 350W RMS.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS — All 4 Channels\u003c\/h3\u003e\n \u003cp\u003e100W RMS per channel at 4Ω. 175W per channel at 2Ω. 350W per pair bridged at 4Ω. Every channel independently tested at rated load simultaneously — not one channel driven while the others idle. What’s on the spec sheet is what comes out of all four terminals, in every configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eFour Channels. Any Configuration.\u003c\/h3\u003e\n \u003cp\u003eRun all four channels for a complete front and rear stage at 100W RMS each. Bridge to two channels for 350W RMS stereo — enough output for a dedicated subwoofer pair while the remaining channels handle your front stage. One amplifier, multiple install options, the same verified standard in every configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eOEM Upgrade — High-Level Input Ready\u003c\/h3\u003e\n \u003cp\u003eBalanced low-level inputs reject common-mode noise before it reaches the signal chain. High-level inputs accommodate factory OEM source units directly — no aftermarket head unit required. Input sensitivity spans 400mV to 20V. The AC600K4 installs cleanly into factory systems as a direct upgrade, without additional adapters in most installations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eWide-Range HPF and LPF — 12dB\/Octave\u003c\/h3\u003e\n \u003cp\u003eHigh-pass filtering from 400Hz to 4kHz and low-pass filtering from 40Hz to 400Hz give full crossover control over every channel — protect tweeters from low-frequency excursion, eliminate driver overlap, and tune the system precisely without an outboard processor. A \u0026gt;89 dB signal-to-noise ratio keeps the background dead-silent between tracks.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB — Built to Last\u003c\/h3\u003e\n \u003cp\u003eWhere most 4-channel amplifiers at this price point use a 2-layer PCB, the AC600K4 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all four output stages, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over the long term — all in a compact 8.31″ chassis.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Way Protection — Always Active\u003c\/h3\u003e\n \u003cp\u003eThermal shutdown, short-circuit, over-voltage, and under-voltage protection operate across all four channels independently. Solid nickel-plated terminals maintain a low-resistance connection years after install. Soft on\/off delay eliminates speaker thump at startup and shutdown — protecting tweeters and mid-range drivers from the voltage transients that cause premature wear.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Channel Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e100W x 4 RMS\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eFull-Range Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eOEM Upgrade Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eBridgeable 4-Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCompact Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043981123681,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac1000k4-4-channel-car-amplifier-150w-rms","title":"AC1000K4","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Compact Full-Range Digital 4-Channel · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1000\u003cspan class=\"red\"\u003eK4\u003c\/span\u003e — 150W × 4 RMS\u003cbr\u003e4-Channel Car Amplifier | 89% Efficient · OEM Ready\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1000K4 is a compact full-range digital 4-channel amplifier built for clean, efficient power across your entire speaker system. Rated at \u003cstrong\u003e150W RMS per channel at 4 ohms\u003c\/strong\u003e and \u003cstrong\u003e225W RMS per channel at 2 ohms\u003c\/strong\u003e — all four channels driven simultaneously, independently verified — it delivers 89% efficiency in a 9.49″ chassis. With high-level inputs and DC auto turn-on, it installs directly into factory systems with no aftermarket head unit required.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS — All 4 Channels\u003c\/h3\u003e\n \u003cp\u003e150W RMS per channel at 4Ω. 225W per channel at 2Ω. 450W per pair bridged at 4Ω. All four channels tested simultaneously at rated load — not one channel driven while the others idle. What’s on the spec sheet is what comes out of all four terminals, in every configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e89% Efficiency — Runs Cool\u003c\/h3\u003e\n \u003cp\u003eAt 89% Class-D efficiency — the highest in the AC Series 4-channel lineup — the AC1000K4 converts more of your electrical system’s power into audio output and less into heat. The result is a cooler-running chassis under sustained load, less strain on your vehicle’s charging system, and a longer service life for every component in the signal chain.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eFour Channels. Any Configuration.\u003c\/h3\u003e\n \u003cp\u003eRun all four channels for a complete front and rear stage at 150W RMS each. Bridge to two channels for 450W RMS stereo — enough for a subwoofer while the remaining pair drives your front stage. Or bridge one pair for a dedicated sub output and run the other two full-range. One amplifier, multiple install options, no power compromises.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eOEM Drop-In — DC Auto Turn-On\u003c\/h3\u003e\n \u003cp\u003eHigh-level inputs accommodate factory OEM source units directly — no aftermarket head unit required. DC auto turn-on powers the amplifier reliably with the vehicle regardless of whether a remote turn-on wire is available. Input sensitivity spans 400mV to 20V, covering factory and aftermarket sources without additional adapters in most installations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eWide-Range HPF and LPF Crossovers\u003c\/h3\u003e\n \u003cp\u003eHigh-pass filtering from 400Hz to 4kHz and low-pass filtering from 40Hz to 400Hz give full crossover control over every channel — protect tweeters from low-frequency excursion, eliminate driver overlap, and tune the system precisely without an outboard processor. The 12dB\/octave slope provides a controlled, musical rolloff ideal for coaxial and component setups alike.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB — Built to Last\u003c\/h3\u003e\n \u003cp\u003eWhere most 4-channel amplifiers at this price point use a 2-layer PCB, the AC1000K4 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all four output stages, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over the long term. Soft on\/off delay eliminates speaker thump at startup and shutdown.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Channel Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e150W x 4 RMS\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eFull-Range Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eOEM Integration Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eBridgeable 4-Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eEfficient Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043987087457,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac1500k4-4-channel-car-amplifier-250w-rms","title":"AC1500K4","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Full-Range Digital 4-Channel · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1500\u003cspan class=\"red\"\u003eK4\u003c\/span\u003e — 250W × 4 RMS\u003cbr\u003e4-Channel Car Amplifier | OEM Drop-In Ready\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1500K4 is a full-range digital 4-channel amplifier built for high-output front and rear staging. Rated at \u003cstrong\u003e250W RMS per channel at 4 ohms\u003c\/strong\u003e and \u003cstrong\u003e375W RMS per channel at 2 ohms\u003c\/strong\u003e — all four channels driven simultaneously, independently verified — it delivers consistent output in every configuration. Bridge any pair for 750W RMS. With DC auto turn-on and high-level inputs, it installs cleanly into factory systems without an aftermarket head unit.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS — All 4 Channels\u003c\/h3\u003e\n \u003cp\u003e250W RMS per channel at 4Ω. 375W per channel at 2Ω. 750W per pair bridged at 4Ω. All four channels tested simultaneously at rated load — not one channel driven while the others idle. What’s on the spec sheet is what comes out of all four terminals, in every configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eFour Channels. Any Configuration.\u003c\/h3\u003e\n \u003cp\u003eRun all four channels for a complete front and rear stage at 250W RMS each. Bridge to two channels for 750W RMS stereo — powerful enough for a subwoofer while the remaining pair handles your front stage. Or bridge one pair for a dedicated sub output and run the other two full-range. The AC1500K4 adapts to the build.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eOEM Drop-In — DC Auto Turn-On\u003c\/h3\u003e\n \u003cp\u003eHigh-level inputs accommodate factory OEM source units directly — no aftermarket head unit required. DC auto turn-on powers the amplifier reliably with the vehicle regardless of whether a remote turn-on wire is available, making the AC1500K4 a clean, no-compromise upgrade for stock systems. Input sensitivity spans 400mV to 20V.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eWide-Range HPF and LPF — 18dB\/Octave\u003c\/h3\u003e\n \u003cp\u003eHigh-pass filtering from 400Hz to 4kHz and low-pass filtering from 40Hz to 400Hz give surgical crossover control over every channel — enough range to integrate tweeters, mid-bass drivers, and a subwoofer precisely, without a separate outboard processor. The 18dB\/octave slope delivers a steeper, more controlled rolloff than most 4-channel amplifiers at this price point.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSelf-Recovering 4-Way Protection\u003c\/h3\u003e\n \u003cp\u003eThermal shutdown, short-circuit, over-voltage, and under-voltage protection operate across all four channels independently. Short-circuit protection on the AC1500K4 is self-recovering — the amplifier detects the fault, shuts down the affected channel, and resumes automatically once the condition clears. No manual reset. No trip to the trunk. Soft on\/off delay eliminates speaker thump at startup and shutdown.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most 4-channel amplifiers at this price point use a 2-layer PCB, the AC1500K4 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all four output stages, improve thermal dissipation at 84% efficiency, and deliver structural rigidity that holds up to vehicle vibration over the long term.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Channel Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e250W x 4 RMS\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eFull-Range Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eOEM Integration Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eBridgeable 4-Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e750W Bridged\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043990265953,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"aunex-ac2000k4-4-channel-car-amplifier-350w-rms","title":"AC2000K4","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Compact Full-Range Digital 4-Channel · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC2000\u003cspan class=\"red\"\u003eK4\u003c\/span\u003e — 350W × 4 RMS\u003cbr\u003e4-Channel Car Amplifier | Full-Range Digital\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC2000K4 is a compact full-range digital 4-channel amplifier built for high-output front and rear staging. Rated at \u003cstrong\u003e350W RMS per channel at 4 ohms\u003c\/strong\u003e and \u003cstrong\u003e500W RMS per channel at 2 ohms\u003c\/strong\u003e — all four channels driven simultaneously, independently verified — it delivers consistent, measurable output in every configuration. Bridge any pair for 1,000W RMS stereo output. Four channels. One standard. No compromise.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS — All 4 Channels\u003c\/h3\u003e\n \u003cp\u003e350W RMS per channel at 4Ω. 500W per channel at 2Ω. 1,000W per pair bridged at 4Ω. All four channels tested simultaneously at rated load — not one channel driven while the others idle. What’s on the spec sheet is what comes out of all four terminals, in every configuration.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eFour Channels. Any Configuration.\u003c\/h3\u003e\n \u003cp\u003eRun all four channels for a full front and rear stage at 350W RMS each. Bridge to two channels for 1,000W RMS stereo — powerful enough to drive a subwoofer while the remaining pair handles your front stage. Or bridge one pair for a dedicated sub output and run the other two full-range. The AC2000K4 adapts to the build, not the other way around.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eWide-Range HPF and LPF — 12dB\/Octave\u003c\/h3\u003e\n \u003cp\u003eHigh-pass filtering from 400Hz to 4kHz and low-pass filtering from 40Hz to 400Hz give surgical crossover control over every channel — enough range to integrate tweeters, mid-bass drivers, and a subwoofer precisely, without a separate outboard processor. The 18dB\/octave slope delivers a steeper, more controlled rolloff than most 4-channel amplifiers at this price point.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSelf-Recovering 4-Way Protection\u003c\/h3\u003e\n \u003cp\u003eThermal shutdown, short-circuit, over-voltage, and under-voltage protection operate across all four channels independently. Short-circuit protection on the AC2000K4 is self-recovering — the amplifier detects the fault, shuts down the affected channel, and resumes automatically once the condition clears. No manual reset. No trip to the trunk.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most 4-channel amplifiers at this price point use a 2-layer PCB, the AC2000K4 is built on a 4-layer surface-mount design. Dedicated internal power and ground planes reduce impedance across all four output stages simultaneously, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over the long term.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eBalanced Inputs — OEM Compatible\u003c\/h3\u003e\n \u003cp\u003eZero-Point Balanced inputs (CMRR architecture) reject alternator whine and ignition interference at the point of entry. Input sensitivity spans 400mV to 20V — compatible with factory OEM head units via high-level input, aftermarket receivers, and DSP processors. Spectra-Core RGB illumination and LED clipping indicator are integrated standard, no additional kits required.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Channel Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e350W x 4 RMS\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eFull-Range Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eBridgeable 4-Channel\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1000W Bridged\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45043992592481,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}]},{"product_id":"ac1800kd1-v2","title":"AC1800KD1 (v2)","description":"\u003cstyle\u003e\n :root {\n --red: #8b0000;\n --red-dim: #600000;\n --page-bg: #ffffff;\n --surface-2: #f5f5f2;\n --surface-3: #eeeeea;\n --border: #ddddd8;\n --ink: #111110;\n --ink-soft: #333330;\n --mid-text: #666660;\n --mono: 'Share Tech Mono', monospace;\n --red-light: #f0e4e4;\n --red-mid: #d4a0a0;\n }\n\n *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }\n\n .seo-card {\n background: var(--page-bg);\n border-top: 1px solid var(--border);\n padding: 100px max(72px, calc((100% - 1440px) \/ 2 + 72px));\n font-size: 16px;\n }\n\n .seo-card-inner {\n display: grid;\n grid-template-columns: 1fr;\n gap: 60px;\n }\n\n \/* ─── LEAD ─── *\/\n .seo-lead-tag {\n font-family: var(--mono);\n font-size: 12px;\n color: var(--red);\n letter-spacing: 0.22em;\n text-transform: uppercase;\n display: block;\n margin-bottom: 16px;\n }\n\n .seo-lead-title {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 800;\n font-size: clamp(32px, 4vw, 52px);\n line-height: 1;\n text-transform: uppercase;\n letter-spacing: 0.01em;\n color: var(--ink);\n margin-bottom: 24px;\n }\n\n .seo-lead-title .red { color: var(--red); }\n\n .seo-lead-intro {\n font-size: 15.5px;\n line-height: 1.8;\n color: var(--ink-soft);\n max-width: 820px;\n }\n\n .seo-lead-intro strong { color: var(--ink); font-weight: 600; }\n\n \/* ─── BODY GRID ─── *\/\n .seo-body {\n display: grid;\n grid-template-columns: repeat(3, 1fr);\n gap: 2px;\n background: var(--border);\n }\n\n .seo-block {\n background: var(--page-bg);\n padding: 32px 28px;\n transition: background 0.2s;\n position: relative;\n overflow: hidden;\n }\n\n .seo-block::after {\n content: '';\n position: absolute;\n bottom: 0; left: 0; right: 0;\n height: 2px;\n background: var(--red);\n transform: scaleX(0);\n transform-origin: left;\n transition: transform 0.3s ease;\n }\n\n .seo-block:hover { background: var(--surface-2); }\n .seo-block:hover::after { transform: scaleX(1); }\n\n .seo-block h3 {\n font-family: 'Barlow Condensed', sans-serif;\n font-weight: 600;\n font-size: 16px;\n text-transform: uppercase;\n letter-spacing: 0.06em;\n color: var(--ink);\n margin-bottom: 10px;\n }\n\n .seo-block p {\n font-size: 13.5px;\n line-height: 1.7;\n color: var(--mid-text);\n font-family: 'Open Sans', sans-serif;\n font-weight: 300;\n }\n\n \/* ─── KEYWORD TAGS ─── *\/\n .seo-tags {\n display: flex;\n flex-wrap: wrap;\n gap: 8px;\n padding-top: 8px;\n border-top: 1px solid var(--border);\n }\n\n .seo-tag {\n font-family: var(--mono);\n font-size: 11px;\n letter-spacing: 0.12em;\n text-transform: uppercase;\n color: var(--mid-text);\n border: 1px solid var(--border);\n padding: 6px 14px;\n background: var(--surface-2);\n }\n\n \/* ─── RESPONSIVE ─── *\/\n @media (max-width: 900px) {\n .seo-card { padding: 72px 24px; }\n .seo-body { grid-template-columns: 1fr; }\n }\n\u003c\/style\u003e\n\n\u003csection class=\"seo-card\"\u003e\n \u003cdiv class=\"seo-card-inner\"\u003e\n\n \u003c!-- LEAD --\u003e\n \u003cdiv class=\"seo-lead\"\u003e\n \u003cspan class=\"seo-lead-tag\"\u003e◆ AC Series · Class-D Monoblock · 2026 Edition\u003c\/span\u003e\n \u003ch2 class=\"seo-lead-title\"\u003eAUNEX AC1800\u003cspan class=\"red\"\u003eKD1\u003c\/span\u003e — 1800W RMS\u003cbr\u003eClass-D Monoblock Car Amplifier | 1-Ohm Stable\u003c\/h2\u003e\n \u003cp class=\"seo-lead-intro\"\u003eThe AUNEX AC1800KD1 is a compact, full-power Class-D monoblock amplifier engineered for high-output subwoofer systems where verified performance matters. Rated at \u003cstrong\u003e1,800 watts RMS at 1 ohm\u003c\/strong\u003e — not peak, not burst — every unit is independently lab-tested at rated power before it ships. What's on the spec sheet is what comes out of the terminals.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c!-- BODY BLOCKS --\u003e\n \u003cdiv class=\"seo-body\"\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eIndependently Verified RMS Power\u003c\/h3\u003e\n \u003cp\u003eUnlike inflated peak-power ratings common in the car audio market, the AC1800KD1 is rated under real-world operating conditions: 14.4V DC, full bandwidth, both channels driven. 1,800W at 1Ω. 1,200W at 2Ω. 650W at 4Ω. No asterisks. No fine print. Just the power we promised.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e1-Ohm Mono Stable — By Design\u003c\/h3\u003e\n \u003cp\u003e1-ohm stability is built into the AC Series topology, not a premium feature. Drive your subwoofer at a 1-ohm load without thermal derating, current limiting, or protection-circuit interference. Class-D efficiency means the compact chassis stays cool under extended high-power operation.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003e4-Layer SMD PCB Construction\u003c\/h3\u003e\n \u003cp\u003eWhere most car amplifiers use a 2-layer PCB, the AC1800KD1 is built on a 4-layer surface-mount design. Additional copper layers reduce power-plane impedance, improve thermal dissipation, and deliver structural rigidity that holds up to vehicle vibration over time.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eUniversal Source Compatibility\u003c\/h3\u003e\n \u003cp\u003eZero-Point Balanced inputs (CMRR architecture) reject common-mode noise from vehicle electrical systems. Input sensitivity spans 400mV to 20V — compatible with factory OEM head units via high-level input, aftermarket receivers, and DSP processors. No additional adapter required in most installations.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eComplete Tuning Control\u003c\/h3\u003e\n \u003cp\u003eVariable low-pass crossover (50–250Hz, 24dB\/octave), subsonic filter (10–50Hz), bass boost (0–18dB @ 45Hz), phase switch (0°\/180°), and an LED clipping indicator for real-time distortion monitoring during setup. Remote bass knob included in the box — not a $30 accessory.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003cdiv class=\"seo-block\"\u003e\n \u003ch3\u003eSpectra-Core RGB · Custom Heatsink\u003c\/h3\u003e\n \u003cp\u003eFull addressable RGB is integrated into the amplifier chassis — no external controller kit, no separate wiring harness. A custom anodized extruded aluminum heatsink manages sustained thermal load. Ready to configure and mount from day one.\u003c\/p\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\n \u003c!-- KEYWORD TAGS --\u003e\n \u003cdiv class=\"seo-tags\"\u003e\n \u003cspan class=\"seo-tag\"\u003e1800W RMS Monoblock\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eClass-D Car Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e1-Ohm Stable Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003e4-Layer SMD PCB\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eSubwoofer Amplifier\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCompact Car Amp\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eLab-Verified Power\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eAC Series 2026\u003c\/span\u003e\n \u003cspan class=\"seo-tag\"\u003eCategory ID: 3583\u003c\/span\u003e\n \u003c\/div\u003e\n\n \u003c\/div\u003e\n\u003c\/section\u003e\n","brand":"AUNEX","offers":[{"title":"Default Title","offer_id":45100347850849,"sku":"AC1800KD1","price":529.99,"currency_code":"USD","in_stock":false}]}],"url":"https:\/\/aunexusa.com\/collections\/ac-series-amplifiers.oembed","provider":"AUNEX","version":"1.0","type":"link"}