Don't buy a W7. Do some research on the net, get something that isn't crazy overpriced and overhyped. When the W7 came out like 8 years ago, it was a waste then and still is. I've never heard them regularly sound good, but have heard plenty sound bad. Once I heard a single 8 that sounded GREAT, but I did say once! If you like a name you can trust, and want a SQL type woofer go with the IDMAX, and save some cheddar. If you're a JL honk go with the W6V2, other than those suggestions know that it's more install (read: the box) than the woofer. My last setup meant to get loud was 2 Alpine Type R 12's (an average sub, great price) vented, killer box on 1K each, and I was pretty happy, made my boy with 3 W7 10's with a JL 500/1 on each real mad! he moved up to 1000/1 on each, and was only mad after that. His box was a JL spec box. Spec boxes are meant to make the woofer not sound bad. In other words, spec boxes are junk.