I just ordered the under seat sub-box from Super Crew Sound yesterday. I believe that thery are in Wisconsin, so I'll probably be a while before I see it (it's coming UPS ground). I just had my Alpine (model 9833) deck installed last week. It's amazing how much of a difference just adding a nice deck can make! I
Once I get the sub box, I'll be putting a 10" Arc Audio sub in it. I still have the alpine sub amp from my previous vehicle, so I'll be using that to power the sub. The deck and the amp are hardly a year old.
I still have a sweet 12" Image Dynamics subwoofer in a standard cube shaped Sub Zero box. No chance of it fitting under the seat in my Frontier....so it'll probably end up on Craigslist, since the wife doesn't want it in her Sienna.
Once I get all the goods installed, I'll post some pics.
I'm having all the work done by Kustom Kar Audio (their spelling, not mine) in Santa Rosa, Ca. Having a buddy who owns a stereo shop is a great perk!
If any of you watch Overhaulin'...there is an episode coming up where they build a car at the SEMA auto show. Kustom Kar was chosen as the crew to do the audio on that car...kinda cool (even though you work for free!)