huh ya iv seen these before or somthing like these, but they beat pretty good? im gunna take a guess and say thats prolly alot louder than any 8 inch sub that would go in the encloser in the rear cargo compartment on the xj's
so im going to do away with my subwoofers im sacrifiscing way to much useful room and weight with the 2 12's and the amp and all that. But i still want a little bass and im considering using that xj enclosure if its even worth my money.