Oh, I totally support you trading up to a XTZ 12.17 Edge. I think you'll see noticeable improvements. I'm just tossing out other suggestions for you to try as well. I've spent a lot of time learning how to use Audyssey to dial my bass in and have a very nice curve right now. There's a lot more to it than the sub itself. The room is who's in charge when it comes to bass, but there are things you can do.