Bandpass Box

I don't know if they are compatible.  I've got the Sony Xplod's, the 5-sided ones.  They are rated at 1200 peak if that helps.  They're bout two years old.  Yeh I do want to keep some SQ.  I guess I should look at a ported box...what is the difference between a ported and a slot ported box?

Ok, I know I'm getting old, but you want more "shove"??  What the heck is "shove"? 

I assume you mean you want more SPL (louder.)  A bandpass enclosure is the best way to squeeze extra SPL out of marginal speakers.  Don't take this the wrong way I am not trying to slam you, but those pentagon-shaped Sony speakers are the definition of marginal.  It really won't matter if they are designed for BP mounting or not, if you want to try it go for it, you can't make them sound worse.  I suggest you stop by your friendly neighborhood car audio shop, tell them you are interested in a pre-fab bandpass box for your speakers and that your budget is $150, and see if they can hook you up.

Cheers!

If you want to try to design one yourself download WinISD (it allows you to model up subs and play around with different boxes and box sizes).  WinISD (click here)

I played around with it a little with your subs in a 6th order bandpass box and it'd be louder than a sealed box definitely. I don't really have that much experience with bandpass boxes though...

Or you could go to a local shop and ask them to build one for you. They will need the T/S parameters (should be in your sub's manual).