what are you powering off your acc? the best way is to have your amp and comptuer with a hot wire to the batt, and the acc is just used to trigger the ps in the puter which then turns everything on. at least thats how i got mine. if your trying to power everything from the acc then that is a problem. maybe the computer if it is low power enough but definatly not the amp. i may be misunderstanding your description, if so my bad.