Upgrade your vehicle’s sound system with the Rockford Fosgate T400X4AD 4-channel amplifier, designed for hybrid, electric, and small cars, as well as motorcycles and UTVs. This compact, energy-efficient amplifier boasts 400 watts of power and features Rockford Fosgate’s proprietary Class-AD technology with Constant Power, ensuring consistent output at both 4-Ohm and 2-Ohm impedances. The versatile amplifier is equipped with a configurable input harness and Molex style connectivity, accepting both RCA and speaker level signals. Top-mounted controls provide easy access to the built-in crossover, C.L.E.A.N. input/output clip detection circuits, and Rockford Fosgate’s patented Punch EQ. The amplifier’s advanced thermal management system, including 3-stage thermal lock extrusion and dual fan forced inductions, keeps the amplifier cool while real-time thermal/protection schemes safeguard against overheating. With its flexible vehicle integration and robust design, the Rockford Fosgate 4-channel amplifier is the perfect upgrade for your car’s speakers and sound system.
Product Highlights
- Compact 4-channel amplifier with 400 watts of power for enhanced car audio
- Constant Power technology for consistent output at 4-Ohm & 2-Ohm impedances
- Flexible integration for hybrid, electric, small cars, trucks, motorcycles, and side-by-side UTVs
- Low-level and high-level inputs with auto turn-on and 2/4 channel input switch for easy installation
- Dual fan-cooled with real-time thermal sensing for reliable performance





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