{"product_id":"dc-audio-90-4-4-channel-amplifier","title":"DC Audio 90.4 4-Channel Amplifier","description":"\u003cdiv\u003e\n\u003cp\u003eDC Audio 90.4 4-Channel Amplifier is a 4-channel Class A\/B amp with a fully active crossover, engineered for SQ-focused builds that demand precise frequency control and clean power across channels. It provides 90 W RMS per channel at 4 ohms, 130 W per channel at 2 ohms, and 250 W per bridged pair at 4 ohms (500 W total).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eFully Active Crossover\u003c\/b\u003e: Each channel has independent filtering, letting you tailor front-stage and subwoofer integration for tighter imaging and cleaner bass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVariable High Pass Filter\u003c\/b\u003e: Adjustable high-pass to keep mid\/treble drivers from shoulders of bass, reducing distortion and voice-coil stress in the lows.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVariable Band Pass Filter\u003c\/b\u003e: Enables precise midbass\/midrange shaping to tighten vocal presence and instrument clarity within a defined frequency band.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e8 AWG Speaker Connections\u003c\/b\u003e: Heavy-gauge wiring support ensures low-impedance paths and consistent current delivery to speakers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e4 AWG Power \/ Ground inputs\u003c\/b\u003e: Robust power and ground connections for stable performance under dynamic musical transients.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInput Mode Switch\u003c\/b\u003e: Flexible setup options to accommodate different source configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eClass A\/B\u003c\/b\u003e: Proven efficiency and dynamics suitable for high-fidelity car audio systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRemote Control\u003c\/b\u003e: Optional remote control capability for convenient sub level adjustments (where supported).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSubsonic Filter (CH1\/2)\u003c\/b\u003e: 10 Hz–100 Hz to protect speakers and minimize cone movement on ultra-low bass.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSubsonic Filter (CH3\/4)\u003c\/b\u003e: 10 Hz–100 Hz for additional channel pair bass control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCrossover Range\u003c\/b\u003e: 50 Hz (500 Hz) ~ 500 Hz (5 kHz) with selectable stages for tailored limiting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMultiply\u003c\/b\u003e: x1, x10 options for crossover calibration precision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCrossover Selector Switch\u003c\/b\u003e: HPF \/ FULL \/ LP-BP to match each channel’s role in the system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBass Boost\u003c\/b\u003e: 0–18 dB to add tactile warmth at the listening position without saturating the sub.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFrequency Response\u003c\/b\u003e: 20 Hz–20 kHz for full-range musical fidelity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSignal to Noise Ratio\u003c\/b\u003e: 105 dB for low-noise performance in active systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDamping Factor\u003c\/b\u003e: 200\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTHD @ 4 ohms\u003c\/b\u003e: \u0026lt; 0.1%\u003c\/li\u003e\n\u003cli\u003e\u003cb fuse rating\u003e: On board 80 amp protection\u003c\/b\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eLED Status Lights\u003c\/b\u003e: Power and Protect indicators for quick health checks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHeatsink\u003c\/b\u003e: HD heatsink with dimensions 14.00\" (350 mm) length, 9.38\" (238 mm) width, 2.35\" (59.6 mm) height for solid thermal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBenefits: This amplifier shines in SQ builds that drive a front stage while optionally bridging the rear channels to a sub. The fully active crossover and per-channel filter options provide precise tonal shaping, while the high-current 4\/8 AWG connections and rugged heatsink ensure stable, clean power under dynamic music. With a 105 dB SNR, less than 0.1% THD at 4 ohms, and generous headroom across 4–2 ohm loads, it is well suited to systems seeking high-fidelity bass extension and articulate imaging without compromise.\u003c\/p\u003e \u003cbr\u003e \u003ctable class=\"tg\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"tg-1xy1\"\u003eDC Amp Model:\u003c\/th\u003e\n\u003cth class=\"tg-1xy1\"\u003e90.4k\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eInput Sensitivity\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e6V~0.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003eHz20Hz~20KHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003e12dB \/ Octave Crossover\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003eYES\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eCH1\/2Subsonic Filter\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003e10Hz ~ 100Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eCrossover\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e50Hz(500Hz) ~ 5ooHz(5KHZ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eMultiply\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003ex1, x10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eCrossover Selector Switch\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003eHPF \/ FULL \/ LP-BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eBass Boost\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003e0~18dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eCH3\/4Subsonic Filter\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e10Hz ~ 100Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eCrossover\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003e50Hz(500Hz) ~ 5ooHz(5KHZ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eMultiply\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003ex1, x10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eCrossover Selector Switch\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003eHPF \/ FULL \/ LP-BP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eBass Boost\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e0~18dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eRemote Control\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003eYES\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eFrequency Response\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003eHz20-20Khs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eSignal to Noise Ratio\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003edB105\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eDamping Factor\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e200\u0026lt;\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eTHD @ 4ohms\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003eLess than 0.1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eFuse Rating\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003eOn Board 80 amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eLED Status Lights\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003ePower and Protect\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-sftl\"\u003eHeatsink Length\u003c\/td\u003e\n\u003ctd class=\"tg-sftl\"\u003e14.00\"\/350mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-1xy1\"\u003eHeatsink Width\u003c\/td\u003e\n\u003ctd class=\"tg-1xy1\"\u003e9.38\"\/238mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"tg-4q9x\"\u003eHeatsink Height\u003c\/td\u003e\n\u003ctd class=\"tg-4q9x\"\u003e2.35\"\/59.6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"DC Audio","offers":[{"title":"Default Title","offer_id":49850208125156,"sku":null,"price":314.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0842\/2522\/9028\/files\/dwdqd_e7f6296c-28df-4d56-8a25-b12b2eef96f1.png?v=1789260576","url":"https:\/\/www.12voltoutlet.com\/products\/dc-audio-90-4-4-channel-amplifier","provider":"12 Volt Outlet","version":"1.0","type":"link"}