Car Audio 4-channel Class AB AmplifierModel: GM-A6704Max Power Rating:4 ohms: 60 watts x channel2 ohms: 95 watts x 4 channelBridged, 4 ohms: 190 watts x 2 channelMax power output: 1000 wattsCEA-2006 Compliant AmplifierPulse Width Modulated MOSFET power supplyBalanced Isolator Input CircuitLED power (on) and protect (off) indicatorsSoft start turn-on4, 3 or 2 channel operationSpeaker-level (high-level) inputs with Signal Sensing Turn-on3-way protection circuitry (thermal, overload, and speaker short protection)Heavy duty aluminum alloy heat-sink for extreme heat dissipationInput sensitivity:Low level: 300mV - 6.5VHigh level: 3V - 26VFrequency Response: 10 - 70,000 HzTotal Harmonic Distortion (THD): <0.05%Signal to Noise Ration: >95 dBSelectable crossover modes (Ch A&B): LPF / OFF / HPFCrossover frequency Ch A: 80hz, 12 dB/octaveVariable crossover frequency (Ch B): 40 - 500 Hz, 12 dB/octaveVariable Bass Boost (Ch B): 0 to +12 dB bass boost at 50 Hz4 gauge power and ground wiring is recommended for installation.Dimensions: 13-3/4"W x 8-1/2"L x 2-3/8"H