Well, I finally have the time here at work to post the sub build in my 2006 Ford F-150 Supercrew. I had a lot of old school stuff laying around including the 3 JL 8w6s. So I figured I could fiberglass an enclosure under the rear seat of the truck to get a little bit of bass in there. Here goes:

Got everything taped and and prepped for glassing.


Got som foil down and built the frame fit in place.


After I got the bottom sealed up and the rings in place my girfriend and I filled it with sand and got right at 1.10 cubic feet.

 

I stretched the fabric and put the upper rings in place to hold the shape.


Soaked the fabric in resin.


I added 3 layers of fiberglass to the cloth to make sure it was strong.


Here, Bondo has been applied and sanded to get it smooth enough to cover. I also test fit the subs.

 

Finally got the carpet on.


Here is the final product installed in the tuck with the seat down and the seat up.




The 3 subs share the 1.10 cubic feet and it is also stuffed with about 1 and a quarter pounds of polyfil. The subs are wired to a 4ohm load as I didn’t know which amp I was going to power them with. Currently I am running a mono MB Quart amp that is supposed to be producing 600 x 1 at 4 ohms. After messing with the deck and realizing that at the beginning I was using both the sub x-over in the head and the amp I decided to defeat the one in the head and use the one on the amp. I am having a hard time blending the subs in with the fronts. The front consists of only a 5 1/4 Focal polyglass comps and there is no mid-bass coming from them at all. Once I go active up front with my H-700 and my Dyn 6 and tweet I should be better able to get them to play together. To my surprise the sub setup gets pretty low and does a great job down there sound wise. If I can get enough out the the 6's in the doors I should be able to use the subs for just the really deep stuff where it is really at it’s best thus far.

 

Thats really clean looking man. Nice work...I wish I knew how to fiberglass.

 

Great job... Looks outstanding... How does it sound?

 

umm is there room for those subs to breathe?

 

The subs themselves sound pretty good without any EQ. Like I said, I am having a tough time blending them with a pair of 5 1/4 components but when I get the doors done and new 6's in there I should solve that problem. I also have an Alpine H700 that I will use to get some eq on them. I was very surprised how low they play. They can get the truck to shake a bit on the inside without you being able to tell outside the truck with the doors closed and windows up.

 

Yup. JL says that each sub needs .33 cubic feet sealed and I have a total of about 1.10 cubic feet total. On top of that I have the enclosure stuffed with about 1 and 1/4 pounds of polyfil. They have a vented pole piece that needs at least about an inch of space behind the sub and the only sub that I had an issue with was the center sub as it sits on the hump. However I did place the sub on a 1 inch thick piece of MDF to get the right hight and everything worked out well. By using fiberglass I was able to cut down on the thickness of the bottom of the enclosure by just enough.

 

Thanks. You should give it a shot. After you have done a few it gets easier. I can't tell you how many enclosures I have built only to start all over cause of something small but it was a lesson learned.

 

Very nice job!! An enclosure like that would cost several hundred bucks to buy... without subs

 

Thanks.

The funny thing about it all now is that I am thinking about doing a new enclosure in the middle seat under the armrest. We will see what I can come up with.

 

Wanna fit one up fer my 02 Scab? I'll pay for a good non-mass produced box! .

 

I wish I had the time. I work 14 hour days and just finding the time to finish this was a task in itself. It's really not hard you just have to take your time with it.

 

yeah, if we had real day jobs I drive a tour bus and hardly see home but to do laundry n bump the mrs. nice try tho, eh??

 

Man that is really nice looking! I just wonder how much sound your loosing by having them so close to the bottom of the seat. I think that's what IH8 was talking about.