My friend is running that same amp @ 3600wrms to 4 kicker cvr 15's ina big *** ported box and it's loud as all hell, he's got a stock alternator with an optima blue top and he still has the bastard running @ 14.0 volts god i dotn know how but he does........O ya this is in a big tahoe........... it's causeing him some alternator hiss, but HONESTLY, i would have thought his alt. woulda taken a crap butit's still working......................... all in all i think this is an alright amp for the money if you're going for SPL, definitly not sq.....but then again the subs i heard werent top of the line sq subs either