box build to specs for 2 jl audio 13w7s

Just some pictures I took during my build, I'm no carpenter, but after pricing a custom ported box for these things, I decided to build my own for about $400 less. This is really my first build, so dont expect too much. I really wanted a different design, but my trunk isn't all that big, So I was limited to what I could do. Just used RE Audio's box calculator and adjusted it to my space and dimensions available and I tuned the Port to 30Hz, like JL recommends. As far as the separate front bezel, I actually added that on because I completely forgot about the subs needing a 1" front wall to mount on. I actually already had it cut the same size as the other front, I was just gonna double stack it, but it didn't fit because I didn't take the side walls into consideration, and I was gonna have to shorten it about 1 1/2" So it would slide in behind the other front panel. I didn't want to give up any airspace, so I decided to go with an oval like shape to makeup for the loss of thickness and not lose any air space. So that it wouldn't look tacky, I counter synced both holes with the router about 1/4", because I figured it would look better then just being flush. Then I took my router and rounded the edges of it with my half round bit. Tomorrow Ill have it wrapped with carpet or Vinyl, and I was gonna paint the front bezel and port gloss black and attach it after carpeting. Any recommendations on the covering/wrapping?

that looks sweet, how do they sound?

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They shake my entire block! they sound good..SPL and SQ

That's awesome.

What is the tool used to create the box? it looks pretty handy.

I used Test Tones to tune my amplifier with my subs for the frequency range i wanted.

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I just used RE Audios Box calculator...Its very easy to use

NICE! Great job on your FIRST build!

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Thanx man

Nice work, although I would recommend adding at least one brace between the woofers that connects all four enclosure sides.

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So, just like a cross? Whats the best material to use? Ive seen people use the round wooden dowels, like for closets.

samuelsteven wrote:

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So, just like a cross? Whats the best material to use? Ive seen people use the round wooden dowels, like for closets.

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Large diameter wooden dowels work, I use those a lot.  Or just cut a piece of MDF that fits and remove the center by cutting a hole in it.

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samuelsteven wrote:

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So, just like a cross? Whats the best material to use? Ive seen people use the round wooden dowels, like for closets.

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If you just use corner bracing you should be ok if you went with 3\4th's mdf or HDF you'll be fine.

you glued everything? How much power are you pumping into these things?

h3_assassin wrote:

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samuelsteven wrote:

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So, just like a cross? Whats the best material to use? Ive seen people use the round wooden dowels, like for closets.

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If you just use corner bracing you should be ok if you went with 3\4th's mdf or HDF you'll be fine.

you glued everything? How much power are you pumping into these things?

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I disagree.  With an enclosure that large, you really need to brace at the center of the parallel walls.  At least.

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Im am going to have to agree with DYohn. You have done a very good job on your build. Why not take the extra time and make it very solid. Then you know nothing is going to happen. Dont short yourself since you've already gone this far. Box looks great!

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Deeg money
"If you cant be good, be good at it"

Yea, I glued everything when I assembled it, then I went over it with silicone in the inside crevices. 2500 watts

Thank you, give me some bracing ideas. I dont understand what you guys are suggesting, how should I do it?

Im pretty sure what DYohn is talking about is cutting a square piece of wood that goes inbetween the two subs as if it were going to seperate them into their own boxes. but cut a big hole in the center of it to make it where the piece of wood does not seperate the two subs but creates a brace for all four sides of the box. I hope this makes sense. It is hard me to explain someone elses idea.

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Deeg money
"If you cant be good, be good at it"

deeg money wrote:

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Im pretty sure what DYohn is talking about is cutting a square piece of wood that goes inbetween the two subs as if it were going to seperate them into their own boxes. but cut a big hole in the center of it to make it where the piece of wood does not seperate the two subs but creates a brace for all four sides of the box. I hope this makes sense. It is hard me to explain someone elses idea.

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Exactly.  Here's an example:

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Got cha...One other thing that I was worried about. when I built the box, I did it to JLs specs, but now Im wondering if JL accounted for the Sub displacement when they calculated the airspace. Or should I have done that? I didnt think about it until I was in the middle of the build. If they didnt do that, then I may be minus some air space, since the subs are so big

MB qaurt did this.

They account for the displacement for the subwoofers.

so long as you told them two woofers would be in the same box and such you should be ok.

Never hurts to call them back and ask.

When you place the reinforcement piece in there you could use that poly fill or dang, i forgot its name. but it helps make up for less room by dropping the frequency of the sound produced.