This is what I did to add some airspace to my sub enclosure. It is just some 4 in PVC added to the box. I cannot take credit for it though It was my friend the installer from the car audio store's idea. I can lift the larger seat almost all the way still also. I also included a photo of the 6.5 mid bass I put in the kick panels.

 

Does that **** actually work? Brilliant idea.

 

Yeah. It's just volume. Works the same as a bigger box. Probably goes a lot deeper now.

 

I'm gonna copy this for the sub I put in my truck. I've been debating about what design I wanted for the box. I'll just use the space under the under seats (for the jack) and put a long piece of pvc in there and run it up through the middle between the seats. Thanks for the idea man!

 

First of all I would like you all to know my wife said I'm STUPID. I spelled solution wrong. I also forgot to mention I also had to remove my jack and bracket to do this.

 

I noticed you spelled it wrong. But women are to be seen, not heard. Yea, I figured I'd have to find a new spot for my jack, but I'm considering a toolbox anyways.

 

Cool Idea!
I removed my jack bracket and put a bigger box the the passanger side behind the seat.

 

No it's Fat Mat from ebay it get's the job done 1/4 the price.