+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 17

Reload Thread: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

  1. #1
    heimsothe's Avatar
    heimsothe is offline Member



    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Icon32 Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    I am purchasing two Alpine SWS-12d2 subs and an Alpine MRX-M110 amp, it is my very first setup and I know a lot of people don't like prefab enclosures, but I've heard sealed ones aren't that bad considering they aren't tuned. Plus, I want a sealed enclosure, not ported. Alpine lists the recommended sealed enclosure size as .9 cu ft. per sub, so for two of them would I be correct in simply saying I need a sub box with 1.8 cu. ft? If this is true my trouble is I can't seem to find an enclosure that has 1.8 cu ft. The closest I've seen is 2 cu ft. Where could I find one with that size? Or am I wrong in thinking that I should be looking for a 1.8cu ft. box because of the .9 per sub x 2? If so what size should I be looking for?

    Also if this matters, I believe, not sure, the displacement is .06 cu. ft. per sub... I got that from pg. 3 of the manual pdf, I think I'm correct in thinking that is the displacement. I don't know if I should be factoring this into my sub box calculations or not... for example if I buy a box that is 1cu. ft per sub (2cu. ft. total) would I subtract .12cu. ft. because of the two alpine subs leaving me with 1.88cu. ft for a sub enclosure?

    So yes, as of now I do want to buy sealed and prefab for my first setup.

    I hope I'm not confusing anyone or mixing anything up! Sorry I'm a newb. Just trying to get the right size enclosure, and yes sealed

    Thanks everyone

    Eli







  2. #2
    jeffdachef's Avatar
    jeffdachef is online now I Bass Boost Rock/Metal!!



    Join Date
    Feb 2013
    Location
    Orange County, CA
    Posts
    2,203
    Post Thanks / Like
    Mentioned
    6 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Quote Originally Posted by heimsothe View Post
    I am purchasing two Alpine SWS-12d2 subs and an Alpine MRX-M110 amp, it is my very first setup and I know a lot of people don't like prefab enclosures, but I've heard sealed ones aren't that bad considering they aren't tuned. Plus, I want a sealed enclosure, not ported. Alpine lists the recommended sealed enclosure size as .9 cu ft. per sub, so for two of them would I be correct in simply saying I need a sub box with 1.8 cu. ft? If this is true my trouble is I can't seem to find an enclosure that has 1.8 cu ft. The closest I've seen is 2 cu ft. Where could I find one with that size? Or am I wrong in thinking that I should be looking for a 1.8cu ft. box because of the .9 per sub x 2? If so what size should I be looking for?

    Also if this matters, I believe, not sure, the displacement is .06 cu. ft. per sub... I got that from pg. 3 of the manual pdf, I think I'm correct in thinking that is the displacement. I don't know if I should be factoring this into my sub box calculations or not... for example if I buy a box that is 1cu. ft per sub (2cu. ft. total) would I subtract .12cu. ft. because of the two alpine subs leaving me with 1.88cu. ft for a sub enclosure?

    So yes, as of now I do want to buy sealed and prefab for my first setup.

    I hope I'm not confusing anyone or mixing anything up! Sorry I'm a newb. Just trying to get the right size enclosure, and yes sealed

    Thanks everyone

    Eli
    get the 2 cubic feet box one its fine. make sure its NET cubic feet, not gross cubic feet. Gross is total number not accounting in thickness and other stuff. .1 - .2 cubic feet off, your not going to see a noticeable difference in performance.



    Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.

    Subs : C2 threatcons
    Sub amp: hifonics brx 2400.1D x 2
    Mids/Highs: PPI Phantom 900.4 - bought from dragnix
    Headunit: Pioneer 80PRS
    Front stage: Massive Audio CKX 6x9 components with jbl ms62C for rear fill (Its a van, I need rear fill) db drive Pro 6.5s comming soon
    320 amp Singer alt comming soon. Just a group 31 deka in the back atm with big 3 finished.

  3. #3
    jeffdachef's Avatar
    jeffdachef is online now I Bass Boost Rock/Metal!!



    Join Date
    Feb 2013
    Location
    Orange County, CA
    Posts
    2,203
    Post Thanks / Like
    Mentioned
    6 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Quote Originally Posted by heimsothe View Post
    I am purchasing two Alpine SWS-12d2 subs and an Alpine MRX-M110 amp, it is my very first setup and I know a lot of people don't like prefab enclosures, but I've heard sealed ones aren't that bad considering they aren't tuned. Plus, I want a sealed enclosure, not ported. Alpine lists the recommended sealed enclosure size as .9 cu ft. per sub, so for two of them would I be correct in simply saying I need a sub box with 1.8 cu. ft? If this is true my trouble is I can't seem to find an enclosure that has 1.8 cu ft. The closest I've seen is 2 cu ft. Where could I find one with that size? Or am I wrong in thinking that I should be looking for a 1.8cu ft. box because of the .9 per sub x 2? If so what size should I be looking for?

    Also if this matters, I believe, not sure, the displacement is .06 cu. ft. per sub... I got that from pg. 3 of the manual pdf, I think I'm correct in thinking that is the displacement. I don't know if I should be factoring this into my sub box calculations or not... for example if I buy a box that is 1cu. ft per sub (2cu. ft. total) would I subtract .12cu. ft. because of the two alpine subs leaving me with 1.88cu. ft for a sub enclosure?

    So yes, as of now I do want to buy sealed and prefab for my first setup.

    I hope I'm not confusing anyone or mixing anything up! Sorry I'm a newb. Just trying to get the right size enclosure, and yes sealed

    Thanks everyone

    Eli
    get the 2 cubic feet box one its fine. make sure its NET cubic feet, not gross cubic feet. Gross is total number not accounting in thickness and other stuff. .1 - .2 cubic feet off, your not going to see a noticeable difference in performance.



    Clip city b1tch, clip clip city b1tch. 10's, 12's, 15's, goin up in flames b1tch.

    Subs : C2 threatcons
    Sub amp: hifonics brx 2400.1D x 2
    Mids/Highs: PPI Phantom 900.4 - bought from dragnix
    Headunit: Pioneer 80PRS
    Front stage: Massive Audio CKX 6x9 components with jbl ms62C for rear fill (Its a van, I need rear fill) db drive Pro 6.5s comming soon
    320 amp Singer alt comming soon. Just a group 31 deka in the back atm with big 3 finished.

  4. Thanks heimsothe thanked for this post
  5. #4
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Thank you!
    Would this be a feasable option? Alpine's website mentions that they work with Audio Enhancers... not that means this is the end all be all
    but here's the link: Amazon.com: Audio Enhancers PSQ200C12 Subwoofer Enclosure Box, Carpeted Finish: Car Electronics




  6. #5
    zako's Avatar
    zako is offline CarAudio.com Elite



    Join Date
    Jan 2011
    Location
    TX
    Posts
    1,347
    Post Thanks / Like
    Mentioned
    6 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Getting the sealed box size off by 10-20% is not a big deal. Besides the box volume, you want to get a box with thicker MDF material. For prefab boxes, the best you can have is usually 3/4 inch MDF, but there are a lot using cheaper thinner MDF.

    However, I must say that Alpine's sealed box recommendation is not optimal for the 12 inch SWS models. The rule of thumb is to set the box volume to get the box qtc as close as possible to 0.7, which results in the best tradeoff between low end extension, power handling, and transient response. Getting it off by a little from 0.7 is not a big deal. The problem with Alpine's SWS sub is that in a 1cu ft box, its qtc is like 1, which is considered way off by some. They list the qtc value in the manual for each box. To get the qtc under 0.8 with the 12 inch SWS sub, you need like a 2cu ft box according to the box modeling software. An Alpine engineer mentioned that they aimed for a high qtc setup to provide a stronger thump appreciated by some car audio enthusiasts, which however, does not explain why the 10 inch and 15 inch SWS subs have a more reasonable qtc in the recommended boxes.

    Anyways, just get the box that's most convenient to you. Try to stuff it with polyfill. The rule is thumb is that stuffing up to 1.5 pounds of polyfill for each cu ft of space can increase the apparent box volume by up to 30% and lower the box qtc. If you haven't bought the subs yet, consider just one 15 inch SWS if you can fit the box. They're considered to be the gems of the SWS lineup. People have got phenomenally good sound with 2 15 inch SWS each in 2cu ft box.




  7. #6
    Dmac1991's Avatar
    Dmac1991 is online now '12 Focus Bangin



    Join Date
    May 2013
    Location
    Dallas - Denton, Tx
    Age
    22
    Posts
    842
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help





    Got LOWZ?!


    CT Sounds 1400.1
    CT Sounds 1/0 OFC
    3 Tantric Sounds MD 10s
    Dcarcustoms 3.6cf Octo-ported tuned to 31hz

    Feedback: http://www.caraudio.com/forums/itrader.php?u=1029894

  8. #7
    Dmac1991's Avatar
    Dmac1991 is online now '12 Focus Bangin



    Join Date
    May 2013
    Location
    Dallas - Denton, Tx
    Age
    22
    Posts
    842
    Post Thanks / Like
    Mentioned
    2 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help





    Got LOWZ?!


    CT Sounds 1400.1
    CT Sounds 1/0 OFC
    3 Tantric Sounds MD 10s
    Dcarcustoms 3.6cf Octo-ported tuned to 31hz

    Feedback: http://www.caraudio.com/forums/itrader.php?u=1029894

  9. #8
    bbeljefe's Avatar
    bbeljefe is online now Premium Member bbeljefe is a Supporting Member of the forum!



    Join Date
    Jul 2013
    Location
    Shreveport, LA
    Posts
    1,740
    Post Thanks / Like
    Mentioned
    20 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    First of all, your assumptions about adding the volume for the two subs is correct. I don't know about the displacement because I don't know how the manufacturer of the box you're looking at figures it. They may account for the displacement of two average subs or they may be stating total internal volume. But either way, that box will work just fine for you because as was mentioned, a 10-20% variance in sealed alignments will make no audible difference.

    And if you don't mind answering... why is it that you prefer a sealed box over ported?



    Owner, Audio Anarchy, LLC
    2915 Youree Drive, Shreveport, LA
    318-780-6149

    Authorized Dealer in NW Louisiana for CT Sounds & Execution Audio. We also carry other products but you really don't want that stuff... ;-)


  10. #9
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Quote Originally Posted by zako View Post
    Getting the sealed box size off by 10-20% is not a big deal. Besides the box volume, you want to get a box with thicker MDF material. For prefab boxes, the best you can have is usually 3/4 inch MDF, but there are a lot using cheaper thinner MDF.

    However, I must say that Alpine's sealed box recommendation is not optimal for the 12 inch SWS models. The rule of thumb is to set the box volume to get the box qtc as close as possible to 0.7, which results in the best tradeoff between low end extension, power handling, and transient response. Getting it off by a little from 0.7 is not a big deal. The problem with Alpine's SWS sub is that in a 1cu ft box, its qtc is like 1, which is considered way off by some. They list the qtc value in the manual for each box. To get the qtc under 0.8 with the 12 inch SWS sub, you need like a 2cu ft box according to the box modeling software. An Alpine engineer mentioned that they aimed for a high qtc setup to provide a stronger thump appreciated by some car audio enthusiasts, which however, does not explain why the 10 inch and 15 inch SWS subs have a more reasonable qtc in the recommended boxes.

    Anyways, just get the box that's most convenient to you. Try to stuff it with polyfill. The rule is thumb is that stuffing up to 1.5 pounds of polyfill for each cu ft of space can increase the apparent box volume by up to 30% and lower the box qtc. If you haven't bought the subs yet, consider just one 15 inch SWS if you can fit the box. They're considered to be the gems of the SWS lineup. People have got phenomenally good sound with 2 15 inch SWS each in 2cu ft box.
    Thank you for the input Zako, I bought an audio enhancers box, the one I linked in my previous reply, which has 2 cu ft. total. 1 cu ft. per chamber. I mean I could return it/cancel the order since it's off my amazon account if you think a bigger sealed box would make my subs sound better? Or will this box suit me well with a little polyfil? Thanks!


    Quote Originally Posted by bbeljefe View Post
    First of all, your assumptions about adding the volume for the two subs is correct. I don't know about the displacement because I don't know how the manufacturer of the box you're looking at figures it. They may account for the displacement of two average subs or they may be stating total internal volume. But either way, that box will work just fine for you because as was mentioned, a 10-20% variance in sealed alignments will make no audible difference.

    And if you don't mind answering... why is it that you prefer a sealed box over ported?
    To answer your question, I know that a ported box can sound just as good if not better than a sealed any day of the weed if its a well built ported box, but I have read that it is really just hard to come buy a prefab ported that is of that quality. I don't have the knowledge nor resources to build a ported at this time either. So I chose sealed because I've read around and from what I've picked up a prefab sealed's of decent to good quality are not as hard to come by. This box is 3/4" mdf, not thin mdf by the way.




  11. #10
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Why do you recommend that box? I'm certainly not shooting your response down, just am curious. It has 2.46 cu. ft, plus poly fill. Wouldn't that be too much space? Or? Sorry I'm new with this stuff. Whats your reasoning?




  12. #11
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Quote Originally Posted by zako View Post
    They list the qtc value in the manual for each box. To get the qtc under 0.8 with the 12 inch SWS sub, you need like a 2cu ft box according to the box modeling software. An Alpine engineer mentioned that they aimed for a high qtc setup to provide a stronger thump appreciated by some car audio enthusiasts, which however, does not explain why the 10 inch and 15 inch SWS subs have a more reasonable qtc in the recommended boxes.
    Sorry for another reply, but also did you mean to get under .8 for the qtc on the 12 inch sws I would need 2 cu ft. per sub or total?




  13. #12
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    Anyone?




  14. #13
    winkychevelle's Avatar
    winkychevelle is offline CarAudio.com Veteran



    Join Date
    Jun 2009
    Location
    Ponchatoula, La
    Age
    23
    Posts
    3,320
    Post Thanks / Like
    Mentioned
    8 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    those subs like large enclosures. proper sized would be 2cubes sealed each but you can cheat it a bit with polyfill.

    2.5-3cubes with polyfill should sound fine really there isnt much to worry about i would fit the biggest you can or are willing to go with



    2014 Chevrolet Cruze Diesel
    Big sq install on the horizon if money stays good
    2012 Nissan Versa Hatch
    Deadened but stock, girls ride now

  15. #14
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    So I should go against the recommended alpine specs of around 1cu ft. per sub?
    I'm not sure going with the bigger enclosure will affect this but the thought popped into my head and I figured I'd ask. Will going with the larger sealed enclosure, say 2.5-3 cu. ft, will that still give me good bass on the tight punchy songs? I listen to a wide range.
    Thanks guys for all the help so far!
    Last edited by heimsothe; 12-26-2013 at 06:59 PM. Reason: An idea popped into my head




  16. #15
    heimsothe's Avatar
    heimsothe is offline Member

    Threadstarter


    Join Date
    Dec 2013
    Location
    Portland, OR
    Posts
    61
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Having trouble finding sealed enclosure for my two SWS-12d2... Please Help

    I canceled my sub box order on the 1 cu ft. per chamber box. I want my subs to be able to deliver a good mix of bass, not overly "boomy", and not overly tight and punchy, but a good mix of both. So what size enclosure should I go for for these 2 sws-d2s?




+ Reply to Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. Making a sealed enclosure for my door speakers
    By boddy in forum Enclosure Design & Construction Help
    Replies: 16
    Last Post: 09-27-2011, 03:20 PM
  2. Looking for a prefabbed sealed enclosure for my 12" IDMAX
    By spark plugs. in forum Subwoofers
    Replies: 11
    Last Post: 03-20-2008, 11:58 AM
  3. volume box sealed for my two 12w6v2?
    By damien02 in forum Enclosure Design & Construction Help
    Replies: 4
    Last Post: 06-22-2007, 11:32 AM
  4. with a sealed enclosure for two subs..
    By Civic96Lx in forum Enclosure Design & Construction Help
    Replies: 7
    Last Post: 05-29-2007, 06:42 PM
  5. Replies: 4
    Last Post: 03-19-2007, 08:56 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum