I'm looking to put two 10 or 12" subs BEHIND the seats in my '04 CC... anyone know of a box that fits back there? I could custom build one if I had to, but it sure would save some trouble if there was one already made... I'm probably putting Pioneer subs in, they have some low-profile ones that should fit...

EDIT: I MEANT to put this in audio&electronics, please move if this is incorrect.

here you go
http://www.subthump.com/

MTX Thunderform...... $700 shipped, matched to your interior. 2 10's, box, and amp.

I made mine not much cash in it at all...couple more pics in my garage.

http://www.dieselplace.com/forum/garageimage.php?do=full&p=14664&d=1156121430

I put an MTX Thunderform Sub Box with (2) 10" MTX Sub woofers. I mounted a Kicker KX 400.1 Class D mono amp under the rear seat and I then hooked the amp up to the stereo with a PAC AOEMGM24 Audio interface. The sound is great and it looks really clean. I got the gear at the sites listed below.

MTX Thunderform Sub Box with (2) 10" subwoofers at Hi Fi Sound Connection www.hifisoundconnection.com (http://www.hifisoundconnection.com) for $ 259.50 plus shipping.

PAC Audio Interface at www.thediscountmall.com (http://www.thediscountmall.com) for $ 32.38 plus shipping.

As for where to get the amp you are on your own. Make sure you get a good amp hook up kit also, the wire and fuse should be good quality. There are lots of ways to go. I choose the behind the seat location because I wanted to keep some items under my seat and not behind the seat. Personnel choice. If you have any questions just ask. Hope this helps.

I have a Infinity BassLink T behind my rear seat, It cranks, Best of all it has its own built in amp!!!

man i got mine from R&D sounds and it only cost my like 100 bucks fits great, to fit the 12" i was told you would have to move the sit forward 1.5" but the 10's sound good