Rockford Fosgate PM400X4 Punch Marine 400 Watt 4-Channel Amplifier

Versatile Marine Power

The Rockford Fosgate PM400X4 is a marine-grade 4-channel amplifier delivering 400W RMS. Compact yet powerful, it’s ideal for front-stage, rear-fill, or subwoofer systems, providing clear, punchy sound in any marine or motorsports application.

Flexible Channel Configurations

This amplifier supports multiple wiring options: 50W x 4 @ 4Ω, 100W x 4 @ 2Ω, or 200W x 2 @ 4Ω bridged. Its Class A/B circuitry ensures high dynamic power while maintaining efficiency, making it suitable for a wide range of system setups.

Built for Performance & Durability

Equipped with Auto Turn-On circuitry, high-level inputs, on-board Punch EQ (+18 dB boost at 45Hz), and 12dB/octave Butterworth crossovers, the PM400X4 delivers professional-grade performance. Engineered to withstand harsh marine environments, it’s backed by a 2-year parts and labor warranty.

Highlights:

• Rockford Fosgate PM400X4 4-Channel Marine Amplifier

• RMS Power: 50W x 4 @ 4Ω, 100W x 4 @ 2Ω, 200W x 2 @ 4Ω bridged

• Class A/B technology for high dynamic power and efficiency

• Compact marine-grade design: 2.4" x 7.8" x 11.0"

• On-board Punch EQ with +18 dB boost at 45Hz

• 12dB/octave Butterworth crossover for precise tuning

• High-level input capable with Auto Turn-On circuit

• Suitable for front-stage, rear-fill, or subwoofer systems

• Designed for marine and motorsports environments

• Famous Rockford Fosgate durability and reliability

• Full 2-Year Manufacturer Warranty when purchased from authorized dealer

Package Contains:

• (1) Rockford Fosgate PM400X4 Punch Marine 400W 4-Channel Amplifier

• Wiring and mounting hardware

• User manual & installation guide

• Warranty documentation