new strange box design
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54808
Printed Date: May 12, 2025 at 5:53 AM
Topic: new strange box design
Posted By: Captanham
Subject: new strange box design
Date Posted: April 28, 2005 at 11:24 PM
Has anyone heard of this before? a guy was telling me about it, and i've seen some weird stuff with boxes but this is suposedly called an ABC box, it's suposedly ment for sq rather than spl, but takes up a rediculous amount of space, it envolve two chambers in a non bandpass box, with three ports going out of the box and between the chambers.. here is a link to what this guy was talking about https://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=11;t=064764 post and tell me if anyone else has heard of this, or used it? or anything, it might be more common then i think, and i just haven't seen it around ------------- Bad Boys Customs
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Replies:
Posted By: oonikfraleyoo
Date Posted: April 29, 2005 at 12:09 AM
Unless I'm mistaken, thats not very new. It's an 8th order Bandpass and in no way suited for SQ.
::EDIT:: Well, after looking closer, maybe it's not. ------------- Nik
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Posted By: ravenndude
Date Posted: April 29, 2005 at 12:39 AM
that's interesting as hell ... maybe i'll try this when i'm done with my new box over the summer.
Posted By: DYohn
Date Posted: April 29, 2005 at 9:24 AM
Yes, it's a version of an 8th order bandpass. Should get very loud over a very narrow band, have crappy transient response, and severely limit the power handling of the woofer. Definately need a high-pass to protect the woofer below the tuning frequency. It is possible to get low bass from small drivers using this kind of alignment. (Bose uses a version of this design in their Acoustamass modules, by the way.) ------------- Support the12volt.com
Posted By: Captanham
Date Posted: April 29, 2005 at 10:39 AM
yea it looks kinda like the 8th order, but it's just different cause the sub is out of the box, i don't really think i'd use it, i doubt it would really make iti sound all that great, i was trying to build a box on winisd for DD's but i can't really figure it out to well, so i guess i'm going to try and stick to something simple and not do anything crazy ------------- Bad Boys Customs
audio - video - security
If you use it. Suport it. Donate to the 12 volt!
Posted By: xTimx
Date Posted: April 30, 2005 at 5:28 PM
i would build something like this for my MA audio's 12d6, but the required specs for a single 12 are: sealed - 1.25cu ft. ported - 2.5cu ft. i have 2 12d6's. so there is no way i can make an "abc" for my crx. it would just be too big for my car.
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xTimx
Posted By: bdl666
Date Posted: April 30, 2005 at 6:16 PM
It's called a Double-Chamber Reflex box, According to David B. Weems. He talks about this type of design on one of his books called; Designing, Building, and Testing Your Own Speaker System A most read if you want to start designing your own boxes.
Posted By: KarTuneMan
Date Posted: May 01, 2005 at 12:45 AM
General rule of thumb........If it's BIG.....it's NOT SQ.. 8th, 12th, or 27th order.......it's not SQ, it should just BooM....... just my opinion.......(and not wrong) -------------
Posted By: xTimx
Date Posted: May 01, 2005 at 2:02 AM
KarTuneMan wrote:
General rule of thumb........If it's BIG.....it's NOT SQ..
8th, 12th, or 27th order.......it's not SQ, it should just BooM.......
just my opinion.......(and not wrong)
??? is there even 12 or 27th order? i thought it was only up to 8th? unless your kidding around ------------- xTimx
Posted By: ravenndude
Date Posted: May 01, 2005 at 2:24 AM
here ... i found this through google. It's not listed on their main page.
https://www.diysubwoofers.org/prt/dual_chamber.htm
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