I bought two of these subs in Dec of 2011.I installed them in a slot ported enclosure.1.0 each chamber.I will say I was impressed,these subs will hit. they are single 4ohm.i have them wired down to 2ohm on a Hi Fonic 1000 watt mono block class D amp.they dont need a lot of power to get them to sound off I push them pretty hard sometimes and still havent had any problems.I’ll say if you are looking for a shallow subwoofer,and on a budget,this is the way to go.you get a lot of bass for the money….. Good Luck
