Sealed JL audio 13W7 build - Page 2 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #11 of 32 Old 09-28-13, 12:41 PM Thread Starter
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peter mandt
 
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Re: Sealed JL audio 13W7 build

I'm planning on building 2 of these, and another with dual 12w7's. I already have another sub I built with an LMS5400 and two passive VMP18s, plus a fathom F113. Looking forward to seeing how all these perform with respect to each other.
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post #12 of 32 Old 09-29-13, 06:20 AM
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Re: Sealed JL audio 13W7 build

84.9505398 liters a unit is to much
Dont look at the Q of the system,whit JL that works not good.
You wil drive the driver way over the Xmax under 25 hz.

JL is just like the carbox,you can look it up butt i will do it for you.

second ,a little box play,s more clean than a big one.

No offense to Mike who know,s more about al kind of sub,s
I made some boxe,s large and small.
If u use the volume that JL would use for automotive,you driver wil have a more tight sound.
And you dont drive them over the Xmax ,84.9505398 liter is way to much volume.
This works in home use just the same

JL site:
Our most potent subwoofer driver is best used with amplifier power in the 500W - 1500W range and is optimized to operate in a 1.875 cu. ft. (53.1 l) sealed enclosure
http://intl.jlaudio.com/13w7ae-d1-5-...-drivers-92116

Follow modus on,nice project for a big JL fan like myself.


EDIT:
3,5 cu. ft would be nice for the Dual 13W7
3 cu. ft would be nice for the Dual 12W7
Netto ,you have to add the bracing

Wich amp do you have in mind?

Simulation is no substitute for thought.

Last edited by morca; 09-29-13 at 10:00 AM.
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post #13 of 32 Old 09-29-13, 11:53 AM Thread Starter
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Re: Sealed JL audio 13W7 build

Morca:

Well, I was planning on using the crown Macro tech 3600vz, one channel for each 13" driver and building 2 boxes for the 13's, but a single box for the 12's. I'm using these for home theater so obviously I want the best low end extension. You're saying that a 2.8 - 3 liter box is too big, even with a high pass filter?
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post #14 of 32 Old 09-29-13, 01:22 PM
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Re: Sealed JL audio 13W7 build

If you build 2 separate sub,s i would go for 1.8 cu ft/50 liter netto for each sub.
Nice amp for the sub,s,1500 watt at 4 ohm is 2000 at 3ohm,so be a little carefull ,the sub is playing optimal on 1200 rms 3 ohm.

I dont use filter,s,REW and a 1124 for dsp works fine on mine JL,s.
I dont boost the lower freq,but smooth the peaks to a flat response, works very well here
Gets me to 15 hz inroom ,give,s a real
You wil love it

Look at your Xmax in WINisd ,if the box is to big the lower freq will tear your woofer apart if you play to loud.

I have build several JL,s for HT and music use,works very good,if you dont build the box to big.

Simulation is no substitute for thought.
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post #15 of 32 Old 09-29-13, 03:43 PM Thread Starter
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Re: Sealed JL audio 13W7 build

When I model the cone excursion for the 13W7 in Win ISD with a box volume of 2.8 cu ft with power at 1500, I only get a cone excursion of .62inches. Is there something I'm missing here?
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post #16 of 32 Old 09-29-13, 03:58 PM
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Re: Sealed JL audio 13W7 build

Quote:
pmandt wrote: View Post
When I model the cone excursion for the 13W7 in Win ISD with a box volume of 2.8 cu ft with power at 1500, I only get a cone excursion of .62inches. Is there something I'm missing here?
Strange over here i get just to the Xmax at 2.8 cu ft whit 1500 watt.
You are right on paper i see know.
But i build these sub,s before,you will be much better of whit a litlle box wich the driver is design,t for.
I own 4 JL,s DIY ,the really play better in the box like JL says.

I know WINisd says someting else,i am sure te litlle box wil preform better.

Simulation is no substitute for thought.
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post #17 of 32 Old 09-29-13, 05:04 PM Thread Starter
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Re: Sealed JL audio 13W7 build

If I do 16"x18"x20" i get about 2cuft with bracing, etc. Maybe I'll go ahead and do a quick 3/4" mdf box and see how it works out without cutting up my 1"pieces .
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post #18 of 32 Old 09-29-13, 05:29 PM
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Re: Sealed JL audio 13W7 build

Quote:
pmandt wrote: View Post
If I do 16"x18"x20" i get about 2cuft with bracing, etc. Maybe I'll go ahead and do a quick 3/4" mdf box and see how it works out without cutting up my 1"pieces .
That will work fine.
With that content will they play nice and tight,
This is an REW file from one of my 13 W3,s,after dsp setting and REW:
I think you wil hit 10 hz flat,if you do it right,maybe lower.
Depend,s on the room, and the position of the sub in the room .
Attached Thumbnails
Sealed JL audio 13W7 build-gesloten-muziek.jpg  


Simulation is no substitute for thought.
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post #19 of 32 Old 11-01-13, 06:35 PM Thread Starter
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Re: Sealed JL audio 13W7 build

I finally got around to making this 1.8 cu ft enclosure out of some spare 3/4 MDF with a 2' thick front baffle made from an MDF and plywood sandwich. I hooked it up powered with a single channel of a Crown Macrotech 3600vz and a minidsp for equalization.

Right out of the box it was almost flat to 10 HZ. I'm excited to see how it measures compared with my Fathom 113 and my LMS5400.
Below is the file from minidsp and REW:
Attached Thumbnails
Sealed JL audio 13W7 build-img_0865-600x800-.jpg  

Sealed JL audio 13W7 build-img_0866-600x800-.jpg  

Sealed JL audio 13W7 build-img_0868-800x600-.jpg  

Sealed JL audio 13W7 build-img_0884-800x593-.jpg  

Sealed JL audio 13W7 build-minidspcurve.png  

Sealed JL audio 13W7 build-rew-file-after-minidsp.png  


Last edited by pmandt; 11-01-13 at 06:41 PM. Reason: error
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post #20 of 32 Old 11-02-13, 05:11 AM
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Re: Sealed JL audio 13W7 build

Wow impressive,very nice box you build.
10 hz flat,that,s JL audio like i know.
Very nice

Simulation is no substitute for thought.
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