Originally Posted by GLH

What frequency is the carpeted box tuned for ? ---------- Yep. Electronics don't like vibration. Why 1 should not mount an amp on a sub box. ---------- You have a 4 channel amp powering a subwoofer ? ---------- If y'all want the best sub-bass in a Ranger, make a sturdy sealed down-fire subwoofer enclosure. I'm not talking comp bass or tickle the gals' pussy in the car next to you bass. I'm talking clean quality bass that gives you that nice all over massage but don't make you deaf or hurt your head.