Ill i have to say is wow... I had the JBL bp1200.1 amp with my w15GTi and it did ok, but i didnt like the fact i didnt have a Subsonic Filter, because my speaker would do some crazy things, and my friend has a 1000/1 with a 13.5 w7, I got my 1000/1 and replaced my 1200.1 with it, god **** i love JL. in about a month (2 paychecks), ill have my 13.5 W7. so im pretty exited. anyways, My 15" is freakin crazy now, I didnt think even with that amp it would do what it does. ive got it in a 1.53cubic foot box, but im thinkin about puttin it in my ported box.