Quote from: Kolk1 on November 26, 2013, 09:22:50 PM
This was my old 2 10inch box. I now have basically the same, but its moved all the way to the right, so I can still use the drives side pass through. Besides needing the pass through for my snowboard, I have never even filled up a 1/4 of the trunk, to where I needed that front ledge that the box sits on.

Yeah that's the good typical spot for a sedan. However, you can make it even cooler by building a beauty board and organizing the shapes a bit. Here's an example of the ones I've done, after building the basic box facing back (for ideas) See the space utilized here, I have a slide-out amp and processor rack (that's a MS8 and Massive 950.5) on drawer slides, so they can be accessed for tuning and whatnot when the beauty panel is moved out of the way. The bars are aluminum U extrusions available at Home Depot / Lowes, rabbeted into the beauty panel. Same trick I used for my Flex build, due to the strength.

Covered originally in matching carpet, the owner wanted something with more flash so I re-covered the top panel with carbon-fiber vinyl in the same silver of the exterior paint.
Another option is to build UP with the subs, like this:

And hide the equipment entirely with a simple panel. Doing this means you'll attract less attention when the trunk is up, and the subs are completely protected. That top thing is actually removable shelf, which holds emergency supplies, blankets, extra shoes, whatever up there with a ledge to keep things from flying around. Simple, but works.

Front had the amps, due to the fold down seats, why not, right?

Now I want to demonstrate another solution, one that might work even better in the trunk of the SHO (and other sedans). This is a box I made for a Fusion, building out of only wood I made a shape that used most of the extra trunk room that's lost to most "boxes" of rectangular beginnings. Interestingly, the nature of the angles I used meant the box was extremely easy to build, because the angles "figured themselves out" mathematically.



So, even with an amp rack on the opposite side, there's still room to throw in TONS of stuff, lengthwise which may mean more to folks than width-wise in a sedan, because of those odd shapes at the corners in the back.

And mind you, that last system was capable of supporting massive subs and massive amps, so even with that there is space to spare.
Final examples for the moment, is a shallow false floor design, one that embraces the spare tire as an important part

And, one that doesn't!

Basically, there's lots of ways to make it work.
You might need to first ask yourself, do you want to mess with fiberglass? It isn't hard, it is messy, expensive, and time-consuming as hell, so consider that. IF you aren't going to go FG, then you can pare down your options to more conventional boxes, but that doesn't mean bad things. Far from it!
If you have specific direct measurements of the trunk space with pics, I can try to make a 3D model of a box similar to the ones you've seen... if you like my style.