Memphis Audio MM900.6V Amplifier MM Series marine grade amplifiers by Memphis were designed to withstand the water and the elements. These amplifiers feature sealed chassis and conformal coated boards, allowing them to perform in the harshest marine environment. These amplifiers feature loads of upgrades geared towards making them the most installer-friendly marine amp ever produced by Memphis. Single-sided terminals, removable power lugs, sealed outputs with waterproof quick disconnects, and sealed top-mounted control panels all make this amplifier extremely durable and user-friendly. With 2/4/6 channel options, this is the most complete Marine amp lineup in Memphis history, allowing for simple and extreme system design. Please see below for more specifications. Specifications: IPX5 Rated Removable Power Terminal  Sealed Removable Signal Connectors  Sealed Top Mount Controls Extruded Aluminum Heat Sink Signal Sensing Auto Turn On  12dB/Octave Butterworth Crossovers Input Select Switch LED Light Strip Remote Bass Knob Protection Circuitry Against Overload, Short Circuitry, And Thermal/Reverse Polarity Variable Bass Boost (0-12dB) Centered At 45Hz 24dB Infrasonic Filter Fully Variable Crossover RMS Power 4Ω: 70 x 4 + 200 x 2  RMS Power 2Ω: 90 x 4 + 300 x 2 Bridged/MONO Power 4Ω: 200 x 2 + 600 x 1  Frequency Response: 10Hz – 36kHz Input Range: 200 mV – 20 V  Dimensions (in): 13.1 x 7.3 x 2