4-Channel Class A/B High Power Amplifier. Variably switchable HP and LP filters RTC (optional), 0.2 Volt - 8 Volt input sensitivity RCA high level input with automatic "Turn On" 4x 70 Watt RMS at 4 Ohms 4x110 Watt RMS at 2 Ohms And 2x 220 Watt RMS mono up to 4 Ohm. Dimensions: 280 x 47 x 171mm Suitable for: 4-Channel