***** *****PM300X1 300 Watt RMS Monoblock Marine/Boat Amplifier Punch Amp. *****High level input capable with Auto Turn-On circuit. RCA pass-thru outputs. Features C. L. E. A. N. Set-up. *****Optional remote Punch Level Control (PLC2) ready (w/ input clip indicator). 12dB/octave Butterworth crossover. *****On-board Punch EQ with +18dB boost @ 45Hz.. Muted turn on. Stealth top mounted control panel. Cast aluminum heatsink. *****Short circuit protection. Over current protection. Marine grade two part epoxy coating on circuit boards. Marine grade stainless steel hardware.