{"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}],"url":"https:\/\/aunexusa.com\/products\/aunex-ac1000k4-4-channel-car-amplifier-150w-rms","provider":"AUNEX","version":"1.0","type":"link"}