if you want sq from an l5 you gotta know how to build a box and make sure it doesnt leak (around the driver) and make sure its a propper sized box for what you are doing. l5 can get real loud but i also know for a fact it can sound really good too. i put an l5 12 into a 2.75 cft box stuffed with 40 ounces of fiberfill and deadened the box with cascade. powered with a jbl 600.1 it sounded pretty **** smooth to me. it was still louder than it needed to be and it went deeep. if you didnt know what the sub was before hearing it i really DOUBT you would ever guess what it was.