The M400-4D is a 400 Watt 4-channel high efficiency Class-D marine amplifier featuring a Marine grade PC Board, on-board Punch EQ, variable crossover and tri-state protection circuits.

• 12dB/octave Butterworth crossover
• 2/4 channel input switch
• 4 Gauge power/ground connectors
• Cast aluminum heatsink
• Top mounted controls
• Marine grade 2-part epoxy coated PCB
• On-board Punch EQ with +18dB boost @ 45Hz.
• Tri-stage protection covers thermal, over-current and short circuits.
• 2 Year Standard Warranty