TRF HE 620.4AB 620Watt RMSPOWER RMS 4ohm 90W X4POWER RMS 2ohm 150W X4POWER RMS(bridged)4ohm 310W X2 1240Watt MAXPOWER MAX 4ohm 180W X4POWER MAX 2ohm 300W X4POWER MAX(bridged)4ohm 620W X2 SIGNAL TO NOISE:93dBINPUT SENSITIVITY:0.2v to 6vCROSSOVER:12db oct/slope4 channel operation4/3/2 channel operationSelectable FULL/HPF/DUPE crossovers CH1/2variable bass boost:0 to 18dBvariable low pass filter:50Hz to 500Hzvariable HI pass filter:50Hz to 500HzSelectable FULL/HPF/BPFcrossovers CH3/4variable bass boost:0 to 18dBvariable low pass filter:50Hz to 500Hzvariable HI pass filter:50Hz to 500Hz1x6 gauge power & speaker terminalsFUSE : 75AMPLED power (green) and protect (red) indicator lightsTested voltage & THD: 14,4v &Less than 2% THDWorking voltage :8.5v to 15vDimension : 410x160x54mm