I used to have have 2 12's Infinity Reference 1250w powered by Alpine - 500W Class D Mono MOSFET Amplifier with Adjustable Crossover In my 99 Cougar I got a new car a 2006 Mercury Mountaineer and am looking for a new system. The last had alot of bang but it didn't sound tight. When there was alot of fast bass it just sounded like a big rumbling instead of hitting individual notes. I want to keep the same amp, just get new subs, what would you recommend? Also the hu is the factory 6 CD changer. Can I hook up the subs to that unit?