i have one vice, that is spl... i cant stand soft bass it has to really hit so of course i just put gain at 8v and vol on pc at max and at that point, it isnt the amp's fault, it is the amount of amperage i have going to it. (one 4 amp box and three 1 amp plugs) when my bro (big into audio) tells me i need upwards of 250 amps. i tested this with my friends dad's car batt. and well, it works but MY dad is so paranoid about acid and the floor, that he says it has to be a power supply or no go. so thats my problem. hope that isnt TOO confusing lemme know whatcha think