Thanks for all the info everybody!! I think I'm gonna pass on these despite how cool they are. My band is super loud and I need something to move more air than my current 4 12's. Wanted to get something different than a traditional 810. I've been playing my Gibson RD Artist through my SVT-AV and wanted a bigger speaker size for some extra woof. I think 15's are my favorite out of all the cabs I've owned. Wish I could track down one of those Ampeg 4x15's.... size and loudness are not an issue 