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Already bought jl 12w3 in high output bandpass box

Looking for specs to build a slotted box for the 12w3... any suggestions? goal is wrecklessly loud!

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I'm guessing it's a four ohm woofer? They made a 2 and a 6. But for the four ohm the ideal enclosure for high output is 4.374 ft3 minus displacement. The golden ratio is 31.75 x 19.75 x 12.25 in inches; external demensions; using 3/4 MDF. Round port 4" in diam and a length of 13.5" (side port). This box is tuned low at 21.74hz with a F3 of 22.63hz. This box should pound!

Posted on Jun 26, 2009

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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

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Trying to find out wat the watts are on a jlw3 12 and a jlw0 12


The JL 12W0 needs 125 watts RMS. Sealed box it needs 1.5 cubic feet. Ported it needs 2.5 cubic feet.
The JL 12W3 needs 300 watts RMS. Sealed box it needs 1.25 cubic feet. Ported it needs 1.75 cubic feet. I wouldn't suggest running these subs together.

Jan 17, 2009 | Jl Audio 12W3 Car Subwoofer

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Finding a good box for the sub


< I design sub enclosures for a living so you are in luck. > The one thing to remember is that generic sub boxes are just that - generic. Even if they have a fancy brand name, unless they are built for the sub you are using you will be making a guess as to how well it works. Don't get me wrong though it may work well in that band pass box, but just imagine how much better it could sound in a custom enclosure. Having said that you have the right idea, and bandpass enclosures can be power-full. If you send me (dynami28@charter.net)
the specs that came with the sub I can give you an idea of what kind of box you should get or, if you want to build your own, I can do the specs on that too. Personally I stay away from bandpass enclosures for one reason. When the subs distorts or gets pushed too hard you can't hear it happening. Since the sub is completely enclosed it's somewhat muffled or insulated so that distortion is hard to hear, which can blow up subs. A good ported enclosure would do well and basic plans should be on Lanzar's website, or available from myself. I do not recommend a sealed enclosure unless these subs will see light duty and you don't expect ground shaking bass. They can sound okay in a sealed box but most car audio enthusiasts like the ported boxes for their increased output and lower tones. Email me if you can't find the specs on those subs I might still have them on file. (Also the enclosure should be at least 3/4" thick MDF with bracing throughout.)
-Dynami

Dec 23, 2008 | Lanzar (Pair) MAXP104D Max Pro Series...

1 Answer

Blown sub?


yeah if its poppin its blown. sorry dude. good luck.

Oct 22, 2008 | Jl Audio 12W3 Car Subwoofer

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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

2 Answers

12W3V2-D4 ENCLOSURE???


They need 1.4-1.7 cubic ft per sub(ported box) less if it is sealed but I wouldn't recommend that, it sounds like ****. Google "Re audio box calculator" and use it to adjust your dementions to your application

Jun 22, 2008 | Jl Audio 12W3 Car Subwoofer

1 Answer

Car Sub JL 12w3 low sound


So I am assuming that you have just setup/wired this up recently? Have you had this working before?
You can have a look at the gain control on the amp & see if this have been set really low. This will help if the signal coming from your stereo is weak. The other thing I would suggest is to make sure that the amp can actually push this sub. I know what the specs say:

  • 1 channel audio amplifier
  • 1 x 350W RMS @ 1.0% THD
  • ThermalThrote full-on power assurance
  • 2 ohms stable (non-bridged mode only)
  • RCA type inputs
  • 0.3-6.0 VRMS input capability
  • Continuously variable High-Pass & Low Pass 50-250 Hz
  • Continuously variable Bass Boost settings (0 tp +12dB)
  • Frequency responce: 10-30,000 Hz
  • S/N >104 dBA at full power @ 0.1% THD
  • >80 dBA at 1W/1M
  • Remote gain control, mounting hardware & screws included
but I don't believe most of these. Many manufacturers embellish what their products can actually do! With the bigger more established brands such as JL Audio you will have no problems, their products have been tried & tested so much on the competition circuit.

Dec 15, 2007 | Jl Audio 12W3 Car Subwoofer

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