{"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}],"url":"https:\/\/aunexusa.com\/products\/aunex-ac1800kd1-class-d-monoblock-amplifier-1800w-rms","provider":"AUNEX","version":"1.0","type":"link"}