MTX Thunder TM601D 1Ch Marine Amplifier Thunder Marine Series Class D Monoblock Marine Amplifier MOSFET power supply Conformal coated circuit board Sealed covers keep amplifier controls and speaker terminals dry Gold-plated screw terminals 200 Watt Mono Marine Amplifier Max power output: 600 watts x 1 chan. MOSFET power supply LED power indicators Selectable Bass EQ (0, 6, or 12 dB bass boost)