Question about Eclipse SW9122 Car Subwoofer

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I want to build a slot ported box for my 12" Eclipse sw9122 sub but I can't find an owners manual to get the manufacturer's recommended enclosure specs. I've heard everything from 1cu.ft. to 3cu.ft. with a ton of different port areas and lengths. I found a site that will calculate specs for you if you know the xmax and desired port tuning frequency. What do you think?

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Xmax is 1.5mm one way
frequency should be somewhere between 19 and 25htz
myself personally if you have the wattage i would go around 2.25cuft but this one should sound fine around 1.5 or 1.75cuft bigger boxes boom...

Posted on Feb 08, 2010

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Hi i have a 15"w3-d4 jl audio sub,can anyone tell me what size antype box i should use ie sealed or ported and the box dimensions


Hi,
I've had a look at the JLaudio website and they recommend 2 box designs, a ported and a sealed.
The sealed box needs a volume of:
2.125 ft3 or 60.2 litres.
To get this you would need to build the box to these dimensions:
22" x 16" x 14.75" or 559mm x 406mm x 375mm
The ported box needs a volume of:
3.50 ft3 or 99.1 litres.
To get this you would need to build the box to these dimensions:
24" x 19" x 18" or 610mm x 483mm x 457mm.
The port needs to be:
3.0" x 10.9" or 76mm x 277mm.
The enclosure recommendations listed above are external dimensions which assume the use of 3/4" (19mm) thick material. If you are using 5/8" (16mm) thick material, subtract 1/4" (6.5mm) from each dimension. Do not use any material with a thickness of less than 5/8" (16mm) as this may compromise the rigidity of the enclosure.
• All enclosure volumes listed above are net internal volumes! Driver displacement, port displacement and brace displacement must be added to obtain the final gross internal volume. All enclosure dimensions above have already taken this into acount.
• When using two subwoofers in a common enclosure simply double the required volume and, in the case of a ported enclosure, use two times the recommended port(s). Likewise, when using three subwoofers in a common enclosure simply triple the required volume and, in the case of a ported enclosure, use three times the recommended port(s).
• We recommend the use of this speaker in a bi-amplified system using high-quality satellite speakers and a high-quality amplifier. We do not recommend the use of this subwoofer with a passive crossover (coil), as this type of device will adversely affect performance.
As you can see it all depends on the space you have available, whilst the vented box will give you a more efficient bass responce especially with the low range frequencies.

If you to go and look at the information about your sub woofer and find out all the information about building or buying the correct enclosure then this is the link to the pdf file I found:
The enclosure info is on page 3:
JL AUDIO 15W3 Tech Specs and box info.
Warm regards
Mike

Oct 12, 2010 | Jl Audio 15W3-D4 Car Subwoofer

1 Answer

Box recomendations


It depends on the size of the subs- 8z 10z 12z 15z? whether or not you port the box is up to you- a ported box is generally louder than a sealed box -as you are coupling and tuning the sound from the rear of the driver with the sound generated from the front of the sub- but the box is also generally larger as well.Then aside from your preference of ported/sealed you have to account for the recommendations of the manufacturer as to whether the sub/speakers are meant to be placed in a ported or sealed enclosure. Most 10 inch subs do well in a box that yields .75 cubic feet to1.0 cubic feet.most 12z do well in 1.0 cu feet to 1.5 subic feet and 15z do well in 1.5 to 2.5 cubic feet. I have a set of 15z that require 4.25 cubic feet per sub-so its important to look into the manufacturers recommendations. The easiest box to make would be a sealed enclosure-and the sound quality generally yields a tighter more accurate bass sound along with increased power handling capability- try going to rockford fosgate .com and look into the woofer box wizard its a program that calculates air space for whatever size box you have room for-hope that helps you-good luck

May 11, 2009 | Car Audio & Video

2 Answers

Building a box, need to know best dimensions for box and port


Hello dirt_digger6,

The specific sub you are asking about would seem to be the TS-302F which is the only 12" 800W Pioneer I have located.

Directly from Pioneer's support knowledgebase:
TS-W302F = Ported: 2.5 Cu.Ft. F3 = 39HzPort: 4  x 6.5 tuned @ 37 Hz with 12 % port noise.

An enclosure 16X18X21, constructed from 3/4" MDF will yield 2.69 Cu.Ft., allowing .19 Cu.Ft. displacement for the sub and port.
There's an excellent "box calculator" located here on the12v.com web site. You can measure the space you have to put the box and fiddle with the dimensions to get close to your ideal volume. There are also calculators on the12v.com which will allow you to calculate a port length based on port diameter (or width/height), enclosure volume, and desired tuning frequency.

Hope this helps.

May 07, 2009 | Car Audio & Video

1 Answer

I need an enclosure for a power acoustik mofo 12''.


Hello miles_jamike,

Power Acoustik recommends a 1.25 CuFt sealed and 2.0 CuFt ported enclosure for the P1, P2 and P3 subs. The PSQ needs 1.25 sealed and 1.75 ported. In physical size, this translates into about 16X12X14 for sealed and about 30X42X15 ported.

You should try to stay pretty close to the recommended enclosure volume for best performance. A good volume calculator is located here on the12V.com website. Just enter the proposed width, height, depth, and material thickness and click the "=" to get the CuFt.

If you are building (or having built) a custom enclosure for a specific location in your vehicle, all you need to do is stay very close to the volume recommended.

If you intend to purchase a generic enclosure, the Goldwood shown here at Parts Express is an exact fit. Atrend also makes good generic enclosures, their model 12SAL in a sealed box with 1.20 CuFt and the 12LSV ported with 2.50 CuFt would be good choices.

Crutchfield has both generic and custom enclosures made by JL, MTX, QLogic, and Bass Slammer. Crutchfield has excellent support. They will respond promptly and positively to your phone or email inquires. If you have never ordered from them, you can use a "friend referral code", such as mine, which is: p7sdj-hrx8q-9800g, and on any order of $200 or more, you receive a $20 discount. And I get a $20 credit on a future order. Also, many orders qualify for free shipping.

Hope this helps.

Apr 29, 2009 | Power Acoustik MOFO-12 Car Subwoofer

1 Answer

I need to know about my 12" dvc eclipse subwoofer but i dont know what modle it is


Hello brandin_1,

I'm assuming that you have the new 12" eclipse. Look at the sub cone. If it is blue in color, you have the Model SW4210 12" DVC SUBWOOFER, 4ohm, 250W RMS,750W MAX. If the cone is silver, it is the Model SW6210 12" DVC SUBWOOFER, 4ohm, 500W RMS, 1500W MAX.

If it is an older dvc Fujitsu Ten 12" eclipse, most likely it is the Model SW9122. If it is a REALLY old 12" eclipse, it is probably a model 88120.

Hope this helps.

Apr 12, 2009 | Eclipse Car Audio & Video

1 Answer

The best bass in this case


HERE is the owners manual for your sub.

If looking for LOUD, ported enclosure is the way to go.

If looking for accuracy, build sealed.

You dont have enough depth for an isobaric setup.

using the maximum dimensions given, 8x13x41, the volume of the biggest enclosure you could make (assuming 3/4" MDF material) is 1.7cu ft.

To tune this 1.7cuft box around 50Hz, you need (1) 4" round port 5" long.

MTX recommends an enclosure of 2cuFt ea. You will only be able to use 1 subwoofer in this application.

Even a sealed enclosure is recommended 1.25cuFt.

You can shove 2 in the vented enclosure, but you may not be happy with the outcome.

Thanks for using FixYa - A Fixya Rating is appreciated!!

Jan 27, 2009 | Car Audio & Video

2 Answers

What size enclosure (sealed)for Alpine 12"1242D(METAL Music)


  • 12" subwoofer with dual 4-ohm voice coils
  • Kevlar reinforced pulp cone with Santoprene™ rubber surround
  • cast aluminum frame with perimeter venting
  • frequency response: 25-500 Hz
  • power handling: 200-500 watts RMS (250 watts per coil)
  • peak power: 1,500 watts
  • sensitivity: 85 dB
  • top-mount depth: 7-5/8"
  • sealed box volume: 0.57-1.0 cu. ft.
  • ported box volume: 0.75-2.0 cu. ft.

  • For rock, i actually have 2 seperate 12's in slot port boxes i built facing forward. Facing forward reduces a little resonance and spl, but keeps alot of that annoying rattle off your tag lol

    Hope this helps :)

    Dec 10, 2008 | Alpine Type-R SWR-1242D Car Subwoofer

    1 Answer

    12W3V2-D4 ENCLOSURE


    12W3v2-D4 sealed or ported enclosure use.
    Sealed 1.25 ft3 23" x 14" x 10"
    Ported 1.75 ft3 29" x 14" x 12.25" - Slot port size 1.375" x 12.5" x 23.75"
    12W3v2-D4
    Fc: 47.4 Hz F3: 41.3 Hz Qtc: 0.83 Recommended Port Tuning: 30.3 Hz

    Maximum wattage: 600 watts per driver.

    I hope this helps you, more info can be found at: http://mobile.jlaudio.com/pdfs/12W3v2_MAN.pdf

    Jun 24, 2008 | Jl Audio 12W3 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

    Cubic inches of a Audiofonics 12


    You should be able to download the owners manual for these speakers. The manufacturer will give detailed specs. on the type and dimensions of recommended enclosures for this particular speaker. If nothing is available to download, you could try to contact the manufacturer directly.

    Jan 03, 2008 | Audiofonics ADF-272 Car Speaker

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