PYLE PLMR440PA 4 Channel Marine Power Amplifier/Public Address System Maximum Power 1200 Watts RMS Power 150 Watts x 4 @ 4 Ohms Power & Protection LED Line & Speaker Level Inputs Bridgeable Trimode Operation Variable Gain Controls Variable Low Pass Crossovers Fixed High Pass Crossovers 0-+18dB Variable Bass Boost Input Voltage Sensitivity Selectors PCB with Conformal Coating Waterproof Hardwired Input/Output & Speaker Cables Balanced Microphone Input Remote Subwoofer Control Signal-to-noise Ratio: better than 102 dB Dimensions: 12-3/4''W x 7-3/8''D x 2-1/4''H Sold as : Unit Maximum Power 1200 Watts - Variable Gain Controls - Waterproof Hardwired Input/Output &amp; Speaker Cables RMS Power 150 Watts x 4 @ 4 Ohms - Variable Low Pass Crossovers Fixed High Pass Crossovers - Balanced Microphone Input Power &amp; Protection LED - 0-+18dB Variable Bass Boost - Remote Subwoofer Control Line &amp; Speaker Level Inputs - Input Voltage Sensitivity Selectors - Signal-to-noise Ratio: better than 102 dB Bridgeable Trimode Operation - PCB with Conformal Coating - Dimensions: 12-3/4''W x 7-3/8''D x 2-1/4''H