We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate P400X4 Car Amplifier is built for car audio enthusiasts who want real, honest power without guessing games. With CEA-2006 certified output, it delivers consistent RMS performance at 14.4V with low distortion across the full audio range, so the numbers you see are the power you actually get. Whether you run a full system or a simple front and rear setup, this amp gives you reliable output that stays clean when you turn it up.
This amplifier is designed to stay stable even when the volume stays high for long periods. The cast aluminum heatsink improves thermal dissipation by about 30 percent compared to traditional designs, while Dynamic Thermal Management spreads heat evenly to prevent hot spots. On top of that, MEHSA³ technology improves MOSFET cooling efficiency, helping the amp maintain performance and reliability even under heavy load conditions where other amps might start to struggle.
Inside, the Trans-ANA high resolution signal path keeps your audio clean and accurate from input to output, reducing distortion and preserving detail. DSM precision surface mount engineering tightens component layout for lower noise and better efficiency, while balanced differential inputs cancel unwanted interference so your music stays clear. The intelligent NOMAD protection system constantly monitors temperature, voltage, current, and impedance, giving you safety without killing performance when things get pushed.
The P400X4 gives you full control over your system with a multi channel power layout that supports 50W x 4 at 4 ohms, 100W x 4 at 2 ohms, or 200W x 2 bridged at 4 ohms. You also get independent crossover controls with high pass, low pass, or full range modes from 50 to 250 Hz, plus Punch EQ for quick bass or treble shaping. CLEAN gain calibration with clip indicators makes tuning simple and helps prevent distortion, while RCA pass through, speaker level inputs with auto turn on, and remote trigger support make integration into almost any setup straightforward and clean.
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Great amp for the price. Ridiculously easy setup with the provided setup disc, not that it was needed as I used to install professionally but could see it being very beneficial to beginners.
A bit costly but I wanted it
We are a Rockford Fosgate authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!
The Rockford Fosgate P400X4 Car Amplifier is built for car audio enthusiasts who want real, honest power without guessing games. With CEA-2006 certified output, it delivers consistent RMS performance at 14.4V with low distortion across the full audio range, so the numbers you see are the power you actually get. Whether you run a full system or a simple front and rear setup, this amp gives you reliable output that stays clean when you turn it up.
This amplifier is designed to stay stable even when the volume stays high for long periods. The cast aluminum heatsink improves thermal dissipation by about 30 percent compared to traditional designs, while Dynamic Thermal Management spreads heat evenly to prevent hot spots. On top of that, MEHSA³ technology improves MOSFET cooling efficiency, helping the amp maintain performance and reliability even under heavy load conditions where other amps might start to struggle.
Inside, the Trans-ANA high resolution signal path keeps your audio clean and accurate from input to output, reducing distortion and preserving detail. DSM precision surface mount engineering tightens component layout for lower noise and better efficiency, while balanced differential inputs cancel unwanted interference so your music stays clear. The intelligent NOMAD protection system constantly monitors temperature, voltage, current, and impedance, giving you safety without killing performance when things get pushed.
The P400X4 gives you full control over your system with a multi channel power layout that supports 50W x 4 at 4 ohms, 100W x 4 at 2 ohms, or 200W x 2 bridged at 4 ohms. You also get independent crossover controls with high pass, low pass, or full range modes from 50 to 250 Hz, plus Punch EQ for quick bass or treble shaping. CLEAN gain calibration with clip indicators makes tuning simple and helps prevent distortion, while RCA pass through, speaker level inputs with auto turn on, and remote trigger support make integration into almost any setup straightforward and clean.
