Taramp's TS800X4COMPACT Compact Size 800W 4-CH Class 1 Ohm per channel Stable Four Channel Car Audio Amplfier Max Output Power @ 12.6 VDC - 1 OHMS: 800W RMS (4 x 200W RMS) Swichable H.P.F (High Pass Filter) Fixed: 80Hz (-12dB/octave) Swichable L.P.F (Low Pass Filter) Fixed: 80Hz (-12dB/octave) Max Output Power @ 13.8 VDC - 4 OHMS: 240W RMS (4 x 60W RMS) Signal Noise/Ratio: &gt;96dB Frequency Response (Full Range): 20Hz to 36kHz (-1dB) Latest version of the Taramps 4 Channel 800 Amp