inputs.text: excellent amp power efficiency - purchased amp recommendation friend bought earlier version newer amp came bit power eliminated random shutoff issue older version rms power output awesome running 4 channels 4ohms 60 watts true power per channel doors 2012 crew cab ram 3500 1 channel 2 ohms 600 watts true power 1 10 alpine type r subwoofer swr10d4 10 dual 4 ohm placed fox acoustics 10 vented amp rack box highly recommend amp