the q and the tc9 are not sq drivers. they are sql drivers with a little more emphasis on sq. it has good tight bass and an awsome transient repsonse. then again if you make a crappy box it will not sound good, you have to rememebr that, a sub is only as good as it's enclosure. i had it in a folded horn t-line. the massive motor on the left is a treo ssx 18" the one on the right is an oz audio matrix power motor with re hc coils //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif