Question about Audiofonics ADF-272 Car Speaker

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Building a ported box for three audiofonic 12" subs but need spec

Can anyone help

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You need to find out factory reccomendations for airspace and port size. Many people with lots of experience building boxes still fail to do this and build good quality boxes, but for the wrong speakers.

Posted on Oct 03, 2009

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1 Answer

12 inch sub(JBL) in box with a 500 watt pioneer amp, sounds good with some types of base. would you cut a port hole in speaker box?


riverray1969 it would help if I knew the exact model number of that JBL sub you are referring to. With that info I can provide exact specs.


Basically, you need to build/modify an sub enclosure that is suited for the sub, the music you mainly play, and vehicle tuning. Generally, sealed enclosures will provide tighter bass response and get decently loud. Some would argue that it will give you greater sound quality. A ported enclosure will give you a louder more booming sound. That depends also on where the port is tuned (ex. 32 hz, 36 hz, etc ). You need to make sure that the enclosure meets the sub's airspace requirement as well. A customized well made enclosure is just as important as the sub you put in it.

Oct 16, 2012 | JBL P-1020D Car Subwoofer

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Ihave 2 sony xs-gtx120Lw 12' going in a 04 honda civic. I want to build a box but do not have the specs for them subs in a ported box


here are the specs

  • Depth (Approx.) : 5 3/4"
  • Diameter (Approx.) : 12"
  • Dimensions (Approx) Depth : 5 3/4"
  • Mounting Dimensions (Approx.) : 13" OD, 5 3/4" mounting depth and 11" mounting diameter.
  • Weight (Approx.) : 11 lbs. 11 oz.
  • Power Handling Capacity : 1000 Watts Max
  • Rated Input : 300 Watts
  • Magnet : Ferrite
  • Material : Polypropylene cone
  • Frequency Response : 30 - 1000 Hz
  • Impedance : 4 Ohms
  • Sensitivity (db) : 86 +/-2dB (1W, 1m)
  • Jun 03, 2011 | Car Audio & Video

    1 Answer

    I don't get d true bass quality from my car system...


    Firstly, If it is an open air sub ( hole with mesh in the center of the magnet) no ports are required, and the box should be sealed on the inside with silicone sealant. If it is a closed air sub ( no hole in the magnet) you need a 50mm port about 120mm long Box size will be 13 inches x 13 inches x 13 inches.

    May 14, 2010 | Pioneer TS-W307D2 12" 1200 Watt Champion...

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    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

    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

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    Need specs to build box for my truck


    I do design sub enclosures for a living and I give free specs on basic setups, so you are in luck. As a starting point I'll start by saying that fitting them under the seat may not work that well. Each sub will need about .75 cu.ft. sealed and probably double or triple that for a good ported box. I can get more specific If you e-mail me (dynami28@charter.net) the specs on those subs. Specifically I will need the Theile Small parameters ( these numbers-VAS, QES, QMS, FS, etc,) and then I can give you a better idea of where they will fit. If they do go under the seat they will probably not produce really low bass because smaller boxes generally produce higher bass tones. This decision should be based on what you listen too and what you expect them to sound like. They most likely will be more thump than boom and some people like that, so figure that out as well and let me know. Also my father has the same truck and there is a lot of room under the back seat. You can also gain some extra space by using fiberglass to conform the enclosure to the contour of the truck.
    -Dynami

    Apr 02, 2009 | Rockford Fosgate Car Audio & Video

    1 Answer

    Need to build a ported sub box for my alpine swr-1222d subs x 2


    Try going to Alpine web site, I think they have box building program as well that you just input your sub models into and it gives you blueprints for various types of enclosures. I know Rockford has one and a comparative attachment to compare equipt specs. Or if you call Alpine headquarters you may be able to get info that way, I once sweet talked a rep @ a demo vehicle I met doing some car shows that turned me on to a senior rep @ Korbon Trading the owners of Rockford Fosgate and they gave me specs for a 5 stage band pass box for some competition subs that was more intricate and detailed than anyone before that could find me, Won me first place in spl. Matching your box specs to your subs is crucial and the best specs are often kept a secret for demo competition vehicles! So ask around with some competition guys or other top experts if your real serious about your boooom.

    Mar 13, 2009 | Alpine Type-R SWR-1222D Car Subwoofer

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    Earthquake eq-12 subwoofer parameters


    I can't seem to locate the specs in my files or on line. From what I remember, you can use/build a sealed enclosure for each sub ranging from 1.5 to 2.5 cu.ft per sub. The larger boxes will play lower bass than the smaller ones at the expense of overall power handling and some efficiency. Ported boxes get a little more difficult but with some trial and error, they can be very effective. Even more so when tuned by the listeners own ear. Let me know if you need specifics on how to do this. Also General specs of your sub can be determined by knowledgeable audiophiles with a brief inspection. Perhaps a local electronics shop (if available) could help in this regard. Good luck and let me know if I can help further.
    -Dynami

    Dec 29, 2008 | Earthquake Sound EQ-SWS12 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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