Audiopipe Micro 2 Channel Marine Powersports Amplifier, 320 Watts 160 x 2 @ 2 Ohms 100 x 2 @ 4 Ohms 320 x 1 @ 4 Ohms (Bridged) DIM (WXHXL) 3.5" x 1.6" x 7.6" Fusing: 30 Amp Class D 2 Ohm Stable High Pass Crossover: 40 - 400Hz @ 12dB Low Pass Crossover: 40 - 400Hz @ 12dB Water Resistance: IPX67 S/N Ratio:> 90dB THS: < 0.08% Frequency Range: 20Hz-20kHz Advanced Full Range Class D Amplifier Full Range Class D Using IR (International Rectifier) Control Chips Small Foot Print Waterproof IP67 Rating SMD with 4 Layer Fiberglass PCB Design Protection: Thermal, Over Current & Short