Rockville ATOM P30 2400 Watt Peak/600 Watt Dyno-Certified RMS 4 Channel Class AB ATV/Car Stereo Amplifier. Atom P30 4 Channel Amplifier The RMS power is tested on a dyno using the certified run. It puts out 150 watts x 4 channels at less than 1% THD at 14.4 volts.
eBay