i have a 9512e, which is considered to be the "god" of all SPL subs, or at least it used to be... there are some heavy hitters out there now.

I ended up smoking it two days ago though, I had some coil issues and I think I just put too much to it.

I have an Orion 2500d on it and yes its immensely loud even in my trunk. I cant wait to get it reconed and try it in the new CRX I will be getting.