JD400/44 channel car amplifier 75 watts RMS x 4 at 4 ohms 100 watts RMS x 4 at 2 ohms 200 watts RMS x 2 bridged at 4 ohms (4 ohm stable when bridged) full range Class D amp design with NexD switching technology frequency response: 12 22,000 Hz variable low and high pass filter (50 500 Hz, 12 dB octave) preamp inputs and outputs differential balanced inputs prevent noise signal sensing turn on with speaker level inputs wiring, fuse, and hardware not included