4Class-D Full Range 2-Ohm Stable 4-Channel Powersports AmplifierPeak Power Rating: 4 ohms: 40 watts x 4 chan.
Total power output: 350 wattsTested to withstand water, dust, mud and vibrationPulse Width Modulated MOSFET power supply4 channel operation3-way protection circuitry (thermal, overload, and speaker short protection)Heavy duty aluminum alloy heat-sinkFrequency Response: 20 - 20, 000 HzSignal to Noise Ration: > 90 dBVariable Bass Boost: 0 to +12 dB bass boostFuse Rating: 30 A x 1Dimensions: 3. Hifonics THOR Series 350W Class-D 4-Channel Powersports Amplifier.5"L x 1. Hifonics THOR Series 350W Class-D 4-Channel Powersports Amplifier 77"HAuthorized Internet Dealer1-year Manufacturer's Warranty Hifonics TPS-A350.