dude you are comparing a head unit with normal processing compared to basically an external processor with way more tuning options than any HU out there. of course its gonna beat a stand alone HU. also this zapco HU, what are the features its supposed to have? build in processing? deadhead? the ability to control dc amps? how much is retail?
and you listened to this zapco head unit already? its already better than nakamichi, denford, mccintosh? //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif.