400W 4-Channel Full-Range Class-D Amplifier

The Rockford Fosgate PBR400X4D is a compact, full-range 4-channel car audio amplifier engineered for stereo front/rear sound systems where space is limited. Leveraging Boosted Rail Technology (BRT), this amplifier delivers an efficient 400 Watts of power while minimizing current draw from your vehicle's electrical system. Its design is particularly well-suited for trucks, sub-compacts, electric, and hybrid vehicles. This amplifier boasts a full-range Class-D topology for high efficiency and a low current draw. It integrates differential inputs with a high-level auto-turn-on feature, simplifying installation into OEM systems. The C.L.E.A.N. (Calibrated Level Eliminates Audible Noise) system provides input and output clip detection with indicator LEDs, ensuring optimal signal integrity. For versatility, it includes selectable fixed 12dB/octave Butterworth crossovers, allowing for precise frequency management. Built with an extruded aluminum heatsink and featuring real-time output and power supply thermal sensing, the PBR400X4D is designed for reliable operation. It incorporates Rockford Fosgate's proprietary protection circuitry for safeguarding against damage. Additional conveniences include a muted turn-on feature to prevent audible pops and discrete surface mount technology for enhanced durability and a compact form factor ideal for stealth installations. The amplifier uses an 8 AWG power and ground connector and offers a remote-out feature when using high-level inputs.