Well I bought this 2 10" sealed box with RE Audio subs and it sounds like complete ***. It picks up mid to high bass great with no low end. So I plan to abort this setup and go back to my original plan of a 12" L7 under the rear seat in a ported box.

YES! I am well aware room is not on our side here so please keep those responses out. Here is why...

After doing much of my homework I have come across subthumps Ultra Deep MAXX box and looking at that their able to squeeze 1.13Cu/ft out per side.

99-06 GM Extended Cab Ultra Deep MAXX Dual 10/12 Downfire Box

If you look at the pics closely they gain .21cu/ft total and an entire inch of mounting depth over there regular Ultra deep box by raising the top.

99-06 GM Extended Cab Ultra Deep Dual 10/12 Downfire Box

Now given that I get the dimensions from either box, In a perfect world I should be able to build a 2.26Cu/Ft ported box for a single 12" L7. I can then tweak those measurements to pull the face of the box out more flush with the face of the seat and possibly raise my seat an inch in the rear and be able to gain close to 2.70-.90cu/ft given that I also do not need the distance of the downfire portion of the sub on the opposite side for the dual setup since I will be running a single. That should allow for an acceptable range that I will need since the Kicker L7 calls for 1.75-3.00cu/ft for a ported box, and if I run a round tube style port I will be able to minimize losing internal airspace vs a square port. Or atleast it seems that way on paper.

So in the end does anyone have this box that they can get me some measurements from to help make me be able to do the impossible as it seems? Thanks in advance.

 

I raised my back seat to fit a W6. I just cutout some 3/4" mdf spacers and put them between the seat bracket and floor which is the limit for the stock studs. Any taller, you will need to do something about extending them. My box I built is for 1 sealed 12" and ended up having to make it go over the hump and stop right at the driver side (box is on passenger side) I wish I wrote it down but I can't remember the air space I got out of it. And to be honest I ended up with a w3 for the time being(4 years ago) still never got the w6 lol.

 

I plan on making this the entire width under the seat... I have come across a few dimensions via other sites while using google... I found one that will have 2.56cu/ft so atleast that gives me a start to crunch some numbers on where I can gain airspace.



And if I combine that with this other from here a few months ago as far as gaining an extra few inches behind the seat itself with it resting on the lip where the seat belts bolt down to.



So now I can sketch out a rough drawing myself and double check measurements. I have been debating today raising the seat 1in by using 1x1 square tubing and bolt that down in the truck and then weld studs to that but at that rate I might as well use 1.5x1.5 or even 2x2 square stock.