{"product_id":"rockford-fosgate-t400x4ad-400w-4-channel-amplifier","title":"Rockford Fosgate T400X4AD 400W 4-Channel Amplifier","description":"\u003cp\u003eThe Rockford Fosgate T400X4AD is a compact four-channel car amplifier designed to add clean, controlled power to a vehicle speaker system. Its 400-watt rated total output supports a conventional four-speaker layout or a two-channel bridged setup. The small chassis helps solve installation-space limitations in cars, trucks, motorcycles, and side-by-side vehicles.\u003c\/p\u003e\u003cp\u003eThis amplifier is suited to listeners upgrading factory-powered speakers or building an aftermarket full-range system. It supplies 100 watts RMS to each of four channels at either 4 ohms or 2 ohms, allowing flexible speaker matching within its rated load range. When bridged, it delivers 200 watts RMS to each of two 4-ohm channels.\u003c\/p\u003e\u003cp\u003eClass-AD circuitry and Constant Power operation are central to the T400X4AD design. The amplifier maintains its rated 100-watt-per-channel output at both 4-ohm and 2-ohm stereo loads. This makes it practical for systems where installation needs or speaker wiring determine the final impedance.\u003c\/p\u003e\u003cp\u003eIntegrated crossover controls help tailor the signal for full-range speakers, tweeters, midbass drivers, or a bridged pair of compatible speakers. High-pass, low-pass, and all-pass selections are available, with adjustable high-pass and low-pass points from 50 Hz to 250 Hz. Punch EQ provides separate bass and treble adjustment for modest system voicing changes.\u003c\/p\u003e\u003cp\u003eThe T400X4AD accepts front and rear high-level or low-level signals through harness connections, making it suitable for factory-radio and aftermarket-head-unit installations. Its high-level input capability includes automatic turn-on, reducing the need for a separate remote-turn-on connection in applicable installations. C.L.E.A.N. input and output clip indicators assist with setting source volume and amplifier gain during system setup.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-Channel Constant Power:\u003c\/strong\u003e Delivers 100 watts RMS per channel at 4 or 2 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBridged Operation:\u003c\/strong\u003e Combines channels for 200 watts RMS x 2 at 4 ohms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass-AD Topology:\u003c\/strong\u003e Provides efficient full-range amplification in a compact enclosure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh- and Low-Level Inputs:\u003c\/strong\u003e Supports aftermarket radios and compatible factory speaker-level signals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC.L.E.A.N. Clip Indicators:\u003c\/strong\u003e Helps set source level and amplifier gain with visual feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Crossovers and Punch EQ:\u003c\/strong\u003e Enables basic speaker filtering and tonal adjustment.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDesign \u0026amp; Installation\u003c\/h3\u003e\u003cp\u003eThe amplifier uses a compact aluminum extruded heatsink design with dual-fan cooling and real-time thermal sensing. Top-mounted controls provide access to gain, crossover, EQ, and setup functions after installation. Its detachable compression power terminal and harness-based signal and speaker connections support space-conscious mounting layouts.\u003c\/p\u003e\u003cp\u003eMount the amplifier on a solid surface with adequate airflow around the cooling system. Use 8 AWG power and ground wiring, a separately purchased 60-amp fuse, and 16 AWG speaker wire as specified. Configure the 2\/4-channel input switch, crossover mode, and gain settings to match the connected source unit and speakers.\u003c\/p\u003e","brand":"Rockford Fosgate","offers":[{"title":"Default Title","offer_id":45657955795014,"sku":"T400X4AD","price":569.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0048\/4163\/5910\/files\/61M8GZUoafL.jpg?v=1784445017","url":"https:\/\/audiowatt.store\/products\/rockford-fosgate-t400x4ad-400w-4-channel-amplifier","provider":"Audio Watt Store","version":"1.0","type":"link"}