Rockford Fosgate PM400X4 Punch 400-Watt 4-Channel Marine Amplifier

The Rockford Fosgate PM400X4 is a four-channel marine amplifier for multi-speaker systems. It supports stereo output or bridged operation, with selectable crossover modes for speaker and subwoofer applications.

• RMS output at 4 ohms: 50 watts × 4
• RMS output at 2 ohms: 100 watts × 4
• Class-AB amplifier design
• Bridged RMS output: 200 watts × 2 at 4 ohms
• Selectable full-range, 50–250 Hz high-pass and 50–250 Hz low-pass filtering
• C.L.E.A.N. input/output clipping indicators for gain setup
• Punch EQ adjustment
• Marine-grade epoxy-coated circuit board
• Marine-grade stainless-steel hardware
• Cast-aluminum heatsink with short-circuit and over-current protection
• Two-channel or four-channel input selection