M-SERIES 1-Channel Amplifier High power digital MONO amplifier with SMD technology, Low Pass Filter Subsonic filter Infinitely variable 0-180° phase shift Up to 85% efficiency possible RTC included RCA high-level input with automatic "TURN ON", Bass EQ at 45 Hz with 0 - 6 dB 1x 550 Watt RMS at 4Ohm 1x 850 Watt RMS at 2Ohm Dimensions 295 x 50 x 185 mm Suitable for: 1-Channel