QS400.4 2 Ohm Mini Compact 4 Channel Car Audio Amplifier 4 X 100 Watts RMS at 2 Ohm - 400 Watt Amp Stereo 12 Volts Amp Class D Full Range Bridgeable. Item model number QS400.4 2 Ohm. 4 Channel car audio amplifier stable at 2 Ohm gives you the benefit of wiring multiple speakers and dividing the power per channel.
eBay