i got a kicker DX350 and a kicker xpl 4-ohm sub, the whole system i got it for under $100 off ebay.i paid around 70-75 for my lil system. is the kicker XPL a good sub? does anyone use it or know about it? it's pretty old i guess. anyways my is a "mono block" "class D amplifier" thats what i saw on kickers web site. i use the system in my room since i don't own a car and is quite loud for one ten inch sub and hits really clean lows when you stand in a certain corner of my room and sounds better than my souround sound system. the amp is powered by a car battery......yeah a car batt =]