Thanks for replying Jake!
sat4fun,
Not sure if you've seen this yet, I'm sure it's old technology by now, but it may be of interest:
http://handcraftedcaraudio.com/2009-infiniti-ex35/
I've been wanting to put a custom "space saving" sub in but I'm not sure what to go with yet. I'll probably stop by my local pro audio to see what they have to say.
Let me know what you find out and do....
D