uh uh i feel dumber now! we need alot more info guy and still we will only be able to give u an estimate. like what 15"s what amp? specs of box? car? charging system upgrade? ? ? ?
come on tho, youve been here since dec '05 and give us that much info...you know we'd need more even to give you a decent guess...but even then, it depends on a lot more...