Product Description:

The Rockford Fosgate P400X4 is a solid go-to 4-channel amp when you want clean, reliable power without overcomplicating the system. It delivers 400 watts of Class-AB power, making it a great fit for running full-range speakers or a small front stage with a sub.

Built with Rockford’s Punch platform, it’s known for staying consistent and holding up over time—whether it’s in a daily driver or a weekend toy.

What it does:

• 4-channel amplifier for full system setups
• Run front/rear speakers or bridge for more power
• Full-range Class-AB sound with solid output

Specifications:

• Power Output:
  • 50W x 4 @ 4Ω
  • 100W x 4 @ 2Ω
  • 200W x 2 bridged @ 4Ω
• Amplifier Class: Class-AB
• Frequency Response: 20Hz – 20kHz
• Signal-to-Noise Ratio: >85 dB
• Input Sensitivity: 150mV – 4V
• Crossover:
  • Variable High-Pass / Low-Pass
  • 50Hz – 250Hz crossover range
  • 12 dB/octave slope
• Punch EQ Boost: 0 – +18dB @ 45Hz
• Inputs:
  • High-level inputs (speaker level)
  • Low-level RCA inputs
• Cooling: Convection cooling design
• Dimensions:
  • Approx. 11.0" x 7.7" x 2.0"