SAZ-1000D - Sundown Audio 1000W 1-Channel Monoblock Amplifier RMS power, 2 ohm linkable/dual mono: 1800W x 1CH RMS power, 1 ohm mono: 1000W x 1CH RMS power, 2 ohm mono: 600W x 1CH RMS power, 4 ohm mono: 300W x 1CH Frequency response: 10Hz~350Hz (+/- 1dB)