CO-SERIES 1-channel digital amplifier Low Pass Filter Subsonic filter infinitely adjustable 0-180° phase shift up to 84% efficiency possible RTC included RCA input with high-level input and automatic "TURN ON Bass EQ at 45 Hz with 0 - 6 dB 1x 400 Watt RMS at 4Ohm 1x 650 Watt RMS at 2Ohm Dimensions 230 x 47 x 171 mm Suitable for: 1-Channel