PC400.4 - Precision Power 400W Power Class Series 4 Channel Amplifier Channels: 4 RMS Power 4 Ohm: 70x4 RMS Power 2 Ohm: 100x4 RMS Power 4 Ohm Bridged: 200x2 Damping Factor: &gt;2000 Stereo Separation: 74dB Channels 1&2 HPF: 15Hz-4kHz Channels 3&4 HPF: 15Hz-4kHz Channels 3&4 LPF: 50-4kHz Bass Boost: 0-12dB Subsonic Filter: 15Hz-4kHz