Pictures of my first box attempt

dotorg
10+ year member

Junior Member
I posted a bit about the box I've been working on in another thread today, but wanted to post pictures for people to see.

The background:

This is a .625 cubic foot sealed enclosure for a 10" Diamond M6mkII subwoofer. Its meant to go in my quad-cab Dodge Dakota, which seems to have what may be the least amount of space for this sort of thing of any car or truck I've ever seen. There are a couple of stealth boxes from places like MTX that'll squeeze behind a seat using a real shallow 10" sub, and some people have built boxes to fit an 8 behind there, but both cases need shallow subs and you lose the ability to fold a seat. The M6 needs 6.5" mounting depth, so that just wasn't an option.

I decided to instead tackle building my own box, something I haven't done before. I wanted something to go in front of the rear seats, between them and the front seats straddling the transmission tunnel. To get enough air space to still leave room for two passengers comfortably back there, it needed to really follow the angles and curves of the available space. I also had to get it built so it blended with the interior -- security through obscurity. If I leave the sub in plain sight, it better look like it belongs there and isn't a sub.

Step 1: a cardboard mockup

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It took a bunch of diagraming and mocking up to get a final prototype made that had the proper amount of air space (or rather would when built of 3/4 MDF).

Unfortunately, I didn't get picture in process, but I snapped some pictures tonight after it'd been assembled partly, and partly painted.

I've already covered the top with 2" foam padding and black vinyl that matches the leather in my truck.

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The front and back have no padding under the vinyl, as its a *very* tight fit, but the sides get 1/8" cotton batting.

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View from underneath (the box is bottom-firing):

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Another side view:

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I've never upholstered anything before, so I was figuring it out as I went along. To do the sides, I stapled the top edge along the top cushion upside down, folded it over the staple line to make a clean seam, and stretched and stapled around the edges.

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The other side done:

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Now, getting impatient, I put it in the truck to see how it fit. Its *tight*.

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The texture isn't exact to the leather, but is very close to the vinyl on the dash.

Side view:

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How it looks with the seat up:

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The front panel isn't on yet... that'll be stapled along the top, spray glued down on the face, and I'll use 3M trim adhesive to hold the side seams down since I can't staple. The rear piece will be the same. I was hoping to do that tonight and get the sub actually mounted in there, but I'm exhausted. Tomorrow night.

So thats my first box attempt and first upholstering attempt. I'm pretty **** proud of the end results. I'm sure it'll sound good. (*crosses fingers*)

 
looks real good, very nice work.

btw nice choice on the sub, //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif i think youll like it

 
Looks awesome. Where do you get that vinyl from?
Jo-Anne Fabrics. I had taken the pull-out cup holder out of the back seat (the box is such a tight fit, with the cup-holder installed, they won't notch into the sub properly), and I carried it into the store and spent a half hour going through all they vinyl looking for a color/texture match. Most of their "black" was real black, but I found one roll of black that was really a dark gray, and was a nearly dead-on match for the charcoal gray interior.

Once I have figured out which amps I've got I'm installing, and have built an amp rack behind the seats, I may use the remainder of the vinyl to cover it to match the interior as well.

My next big challange is the amps... I have three to choose from, a Diamond 7104, a Diamond M3 600.1, and a Diamond M3 400.2. Its unclear right now which I can fit in the truck -- the 7104 is 3" thick, which rules out under a seat, and may rule out behind a rear seat. The 600.1 at a minimum will fit under the passenger bucket in the front, although it sticks a few inches out the rear... that'll be the amp for the sub. Its just a matter of whether or not I can fit the 7104 in the truck or not. Its definitely the preferred amp, since its not exactly a cheap amp, and its just sitting in my basement.

 
Okay, I finally wired it up this morning. I did a lousy job of cutting the hole for the speaker so only seven of the eight screws had wood to bite into. Oops. That means I had a small air leak in the eighth screw hole, that I need to seal up.

I don't have amps in my truck, but I crawled back behind my home theater equipment and unplugged the JL15w6 I use for the sub in my living room, and wired this up instead. My amp is only 2ohm rated, so I didn't push it, plus I live in a condo and my neighbors wouldn't appreciate it.

I have to say at moderate volumes, I'm extremely happy with the sound. Its very punchy. If I'm right next to it on the floor, its got a bit of boominess, but if I stand up, its just pure punch. I'm guessing the fact that its down firing, a lot of that is being attenuated.

Now I can't WAIT to get it in the truck... //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 
I think that is one of the best boxes ive seen in a while. i love the coushin on the top. thats a sweet touch.

very top notch man. good looks from me. A+ work.

now get it installed and give us more pics!

 
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dotorg

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