Question about Alpine Type-R SWR-1242D Car Subwoofer

2 Answers

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

Have 12"1242D Alpine sub. Car is a Mitsubishi Eclipse. How many cubic ft. of air space should I have for best sound with an sealed enclosure. I don't listen to rap or country, Just hard rock and heavy metal. Any suggestions?

Posted by on

  • Josh Murphy May 11, 2010

    I have designed many boxes in my years. 30 years old now. I have found by far, the best sound is sealed with a hatchback type car for rock. What year and model eclipse so i can see the rear hatch style. I can draw out some specs for you.

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 96 Answers

  • 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 :)

    Posted on May 05, 2009

    • Level 1:

      An expert who has achieved level 1.

    • Contributor
    • 2 Answers

    What size box is best for 2 alpine type r's

    Posted on Nov 21, 2010

    1 Suggested Answer

    6ya6ya
    • 2 Answers

    SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

    Hi,
    a 6ya expert can help you resolve that issue over the phone in a minute or two.
    best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
    the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
    click here to download the app (for users in the US for now) and get all the help you need.
    goodluck!

    Posted on Jan 02, 2017

    Add Your Answer

    Uploading: 0%

    my-video-file.mp4

    Complete. Click "Add" to insert your video. Add

    ×

    Loading...
    Loading...

    Related Questions:

    1 Answer

    I have a alpine 6013 sub, what should i tune the port to? i listen to mostly rap if that makes a difference.


    Box should be 1.2 cubic feet. port should be 13 square inches depth 16 inches and Fb/F3 will be 42/35 (Fb=port freq F3=cut-off freq

    Nov 02, 2014 | Car Audio & Video

    1 Answer

    How much, cubic in., air space minimum, sealed encloser and also opitum for sealed enclosure? Speaker is 10in. , 4ohme, CJ-25PL193A Thanks Kevin A.


    This really depends on the subwoofer. All subs are NOT alike. I would recommend visiting the manufacturers website for more information. Typically 1-1.5 cubic feet works with most 10 in subs. But again, please check the manufacturer for more specific instructions.

    Sep 06, 2011 | Panasonic Car Audio & Video

    1 Answer

    WHAT SIZE AND TYPE BOX DO I USE FOR ONE PIONEER TS-W304C SUBWOOFER


    You have a lot of choices for this. First, unless you are tuning the sub to a specific frequency you have options. You didn't specify the size of sub so it's difficult to say specifically, but if it's a 12 inch sub, you need about 1.5 to 2 cubic feet. Of course the performance of the sub depends on the music you listen to. If you listen to rock, pop, classical, or country, I recommend a sealed box. A sealed box gives you better control over your sub. The air acts as a cusion and decreases the return time of the cone to rest position. This gives you tighter bass. If you listen to rap or hip hop, I recommend a ported enclosure. This type of enclosure allows for more cone excursion, thus allowing the sub to recreate lower frequencies. Hope this helps.

    Aug 12, 2011 | Pioneer TS-W304C Car Subwoofer

    1 Answer

    Trying to put ported reccomended subs in sealed box.


    Well, 1.6 cubic foot for a 15 is not nearly enough. A ported box for 1 15 should be in atleast 3 cubes by itself. I suggest building a new box yourself or getting someone else to do it for you. If factory specs on those subs is no larger than 3 cubes per sub then I'd get the box built to 3 cubes per sub after all displacement and tune it in the upper 30's range. Putting big subs like that in a small sealed enclosure can and will damage a sub. and if you try to port an enclosure that is too small to begin with that will also hurt the woofer. Do it right or learn the hard way.

    May 26, 2010 | Kole audio KMX-15 Car Subwoofer

    1 Answer

    Hi i have apioneer ts-w2501d4 sub and i am running it with a vibe a7 slick 1300 watt amp and doesnt sound well ,.what is the problem?is it the amp>?.and can you tell me as well which enclosure box is...


    ported enclosures are for spl only using these will be louder on certain frequencies but can sometimes not play others at all. i say if you want it loud go ported if you want clarity go with sealed. and you have to look at the manual of the sub it self. each sub has a desired volume of air that it wants for the best sound. my subs like to have around 1 cubic foot of air per sub. that might be a good spot to start. but me personally it sounds like you might have your gains set high so your amp is making a static sound which will change the pitch of the sound. and also i prefer a sealed box but thats your choice.

    Apr 14, 2010 | Car Audio & Video

    1 Answer

    I have a 15 inch legacy sharp steel 4000w subwoofer. how much air space does the enclosure need to have? and does it matter if it's sealed or ported?


    about 1.5 cubic feet for a sealed box and it does matter if its ported.. if you port it you need to find the right size port hole and length to suit the box and suit it to the most common music type you listen to..

    Feb 25, 2010 | Car Audio & Video

    1 Answer

    I need bow specifications for a pioneer ts-w308f


    Hello, The problem with the enclosure is that you purchased a "free-air" sub, which is designed to NOT use an enclosure. You need to simply mount the sub on a baffle (board) that covers the whole entire rear deck of your vehicle, and seperates the inside of the trunk from the cabin of the vehicle. Use sealant to keep the two compartments sealed air-tight and mount the sub on the baffle-board. The other option, is to build a very large box (larger than 3 cubic feet) that would be incredibly huge for the subwoofer, as a free-air, it has a VERY high QTS, and relies on a massive amount of air behind the woofer to allow it to reach low frequencies. The best bet would be to get rid of the free-air sub and purchased a sealed enclosure subwoofer for use in a small (.6-1 cubic foot) sealed box.

    Feb 16, 2010 | Car Audio & Video

    1 Answer

    I need to know the demensions for 10 inch subs


    almost any 10 will use .75 cubic feet up to 1.25 cu ft. thats about the size of a milk crate give or take. a sealed box will give you the cleanest tightest bass. A ported box will be louder but also larger at the cost of decreased power handling ability and sound quality. If your subs are designed for small enclosures use a sealed box around .75 to 1.00 cu ft.

    Jan 30, 2010 | Koiiler XM-6715 Car Subwoofer

    1 Answer

    I have a ntx-6810 wanted to know how many cubic feet i need to build a box. thanks for the help


    For this sub the enclosure is pretty basic.

    Sealed box- 2 ft cubed with a shared chamber would be fine. Can go smaller is you need the extra space. THe minimum requirment is .7 per sub.

    Ported box- 3 ft cubed, with the port tuned to about 45 hz will work.. 45 hz isn't very low bass, but is at the very bottomn end of the frequency response for this driver.Also, if you are gonna run a ported enclosure, be ware of power handeling issus, and be careful not to over drive the woofer..800 watts rms for the pair on the high side.

    Aug 08, 2009 | DHD NTX-6812 Car Subwoofer

    Not finding what you are looking for?
    Alpine Type-R SWR-1242D Car Subwoofer Logo

    1,195 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Alpine Car Audio & Video Experts

    xxxxxx xxx

    Level 3 Expert

    4807 Answers

    Tygh Duval
    Tygh Duval

    Level 2 Expert

    290 Answers

    Jaime Hernandez

    Level 3 Expert

    2296 Answers

    Are you an Alpine Car Audio and Video Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides

    Loading...