Here's how I saved my trunk space. I'm not the first to mount the sub down here, but imo, this is one of the better looking ones. It was built strong with the right tools and almost no leg room was lost. There is zero loss on the floor and just under 2 "up" on the firewall.

Ie - zero loss where your heel would go and about 2" where you toes would be.

All told, we got about 1/2 cube down there and it sounds great powered with about 250 watts.

Stock with foam wedge



Wedge removed, lots more airspace needed



Safety first



There's only one way to do it - plasma cutter



Peekaboo!



And a little bit more...



Time to coat this to prevent rust and damp vibrations, resonances, etc.



Laying down some fiberglass mat.



Add resin, wait, remove



Cut matching hole



Check the fit

 

Add a countersunk baffle



Secure baffle in place, remove stretch fleece to make air tight



Another shot, add resin for strength.



JL Audio 10W3v2



Enclosure complete and siliconed into place



Bigger overall shot.



Now we should close up the bottom

 

Some nice heavy duty thick steel.



Same piece, different angle



All stitched up nicely by the mig.



Finished off up top with damping added to enclosure and floor.



Carpet put back in, hole cut



Watercut aluminum grill, sanded, then cleared. Used a JL grill for the black center part to mimick the look of the door tweeters (MY 02/03)



If Honda offered a stock sub, this is what it'd look like.

 

Well I'll give you a big for it. But damn man thats a really big hole in the floor board... not to sure about that, but hey as long as you don't mind cutting the hole

 

Very nice work!! Have you had a sub in the trunk, and can you tell any difference by placing it in the cab? I'm assuming there's quite a difference, and I bet it's worth the extra effort?

 

That looks nice. But definately not for someone planning on doing it over a weekend.

 

Great work. I personally would rather give up some trunk space, but great work no question. You do te welding yourself???

 

looks hot, just what you use to cover it on the outside

 

The gauge of steel used was thicker than the stuff cut out - so it's got to be atleast as strong as what was removed. The majority of the strength in that area is from the frame rail - and it was untouched - outside of welding onto it.

I didn't do the install myself - I had a friend's audio shop do it.

I had a sub in the trunk prior to this, and the difference in sound quality and output is night and day. This couples extremely well with the front end. I went for a long drive with it yesterday and am extremely impressed with it. It blends seamlessly with the front stage and the dynamics are great.

FWIW, they built this in about 3 days, so it could be a weekend project if you have the right tools.

 

Oh, and pictures of the trunk are coming - we're just waiting on the watercut grill for the amp. But I've kept my spare and the new false floor in the well is only a couple inches higher than the stock tool cover - so I've lost virtually no space.