The M400-4D is a 400 Watt 4-channel high efficiency Class-D marine amplifier designed to conform to UV and Salt-Fog protection standards. Amplifier features on-board Punch EQ, variable crossover and tri-state protection circuits, 12dB/octave Butterworth crossover, 2/4 channel switch, 4 Gauge power/ground connectors, Cast aluminum heatsink, Top mounted controls, Conformal coated PCB and UV Protected resistant finish for UV. These amp provide high-efficiency Class-D power for your marine audio system. They meet tough UV and Salt-Fog protection standards, so you can install them with confidence in your pleasure craft, whether you're blasting across inland waterways, or cruising out to your favorite salt-water fishing grounds.

General Features:

• 4-channel marine Boat Yacht amplifier.
• 2/4 channel input switch.
• 75 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
• 200 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
• Conformal-coated circuit board and UV-resistant finish.
• Variable high- and low-pass filters (50-500 Hz, 12 dB per octave)
• Variable bass boost (0-12 dB at 45 Hz)
• Three auto-turn on modes.
• Marine grade 2-part epoxy coated PCB.
• Tri-stage protection covers thermal, over-current and short circuits.
• On-board Punch EQ with +18dB boost @ 45Hz.