Ok... after looking all over the net at different setups in xBs, I think I'm gonna run with the design in the thread I originally listed. I'll just keep the seats down to face it to the rear, and face the box up when I have passengers. Or I may just keep it firing up after seeing all the rides I just checked out, seems to be the go-to in this vehicle. One last question though (not sure if I should post in a different area for this one...if so I'll be happy to move this).... subsonic filter. I'm running a Kenwood 5 channel amp that pushes 500RMS at 2 ohms to the sub channel. It only has low and high pass filters along with a bass boost adjustment. Running 250 to each sub, I'm pretty sure from all I've read that I'll need to add a ssf to keep from damaging them. Am I right? I'm pretty strapped for cash after all the equipment I've added so I'm just looking something relatively inexpensive to get the job done.