Question about Jl Audio 12W7 Car Subwoofer

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Making a custom box for my jl audio 12 w7. It will be fiberglass and mdf. I'm trying to find out the correct port size, the box will be about 1.75 to 2 cu ft. Anybody have any info on how big the port should be? Thx for the help.

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JL has blue prints on their website to build ported or sealed boxes for all of their subs.

Posted on Sep 01, 2010

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My 12w7 has like a springing sound inside it, what is it?


Blown voice coil,,,,it was connected to a JL AUDIO amp correct? w7`s can ONLY be powered by JL amps due to ohm load.Advice buy a better quality sub,w7 is over-rated

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Need box dimensions for 12 inch performance technique icbm-5912 car subwoofer


I have the same sub on the "digital" amp from the same company.

I used the 1.75 ported box from my jl 12w3v3-4 and it sounds great. I am not sure on the correct box size but the box for the 12w3 sounds great. I tried emailing performance and the email was wrong.

Feb 26, 2012 | Performance Teknique ICBM-5912 Car...

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I want to make my own speaker box for a 12w7 jl


you should be able to get the speaker specifications from JL's website. There will likely be a range of box size, for example 0.75 - 1.1 cubic feet. You have to take into account how much power you are giving them as well. Usually with a stronger amp you can use a smaller box as the backpressure will keep from overexcursion but produce a stronger hit. Bigger box will produce lower notes (to a point). Is your Integra a hatchback? If so then you don't have to worry about taking up too much trunk room with the box. (if you fill half your trunk with a sealed box, it can start to behave like a bandpass enclosure, albeit without a tuned port). Also, use stuffing to get deeper/better response out of a sealed enclosure (unless specs say no). For the size, unless you're a whiz, you'll have to take your best guess. I would stay away from the extremes of the range, or if you get a specific volume then be within .1 cubic feet. Also, remember that the sub takes up some of the volume, so pay attention whether the volume spec includes the subwoofer. You should use 3/4" MDF for the box (minimum), so when figuring dimensions, subtract 1.5" from each side's external measurement to get the inside volume. Typically the width and height are determined by the car, then you calculate the volume to see how deep to make the box. Especially for a sub this badass, put each in it's own chamber, if not its own box. This means if it's in one box, there should be a panel in the middle dividing it into two halves. Seal all your seams/corners with silicone caulk or liquid nails. Use wood glue and small nails along all joints. The wood glue will be stronger than the nails once it's dry.

Jun 28, 2010 | Jl Audio 12W7 Car Subwoofer

2 Answers

My cone on my JL W7 cone is cracked, How can I replace?


JL has good customer service, and usually you can get a drop-in replacement core/coil/former/spider. Call/e-mail the techsupport listed on their website, or contact your local dealer for replacement parts/service.

Jun 16, 2010 | Jl Audio 12W7 Car Subwoofer

1 Answer

I got a jl w7 12 in a seald box runnin it with a 1100 watt rms hertz audio amp n its not even loud..how can i mke it luder


try looking @ your amp seeing if it is bridged if it is take look @ this video it might help you.

Jan 26, 2010 | Jl Audio 12W7 Car Subwoofer

1 Answer

Specs for Ported Box for 2 12" MA AUDIO HK12X2 Subs


Hello joseph_delac,

MA Audio's website has the recommended box volume and port size online here. A ported enclosure needs 3.0 CuFt of internal volume and the port should be 48 sq/in and 14.5" in length. A 4X12" rectangular port would give you the recommended 48 sq/in. Using 3/4" MDF, a box 16X18X25 has an internal volume of 3.25 CuFt allowing .25 CuFt for the sub and port displacement.

Hope this helps.

May 13, 2009 | MA Audio HK12X2 Car Subwoofer

3 Answers

Dimension please for enclosure 12w3v2-d2


Typically you use one cubic foot per sub, so a 2 cubic foot box will work fine. To build a basic one, just a rectangular box, using 3/4" MDF (excellent material for a box), cut pieces this way:

2 - 25.5" x 13.5"
2 - 25.5" x 12"
2 - 12" x 12"

This will give you an interior volume of exactly 2 cubic feet. Cut your sub holes out of one of the 25.5" x 13.5" pieces.

Sep 24, 2008 | Jl Audio 12W3v2-D2 Car Subwoofer

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