Custom Enclosure
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=37402
Printed Date: July 09, 2025 at 8:08 PM
Topic: Custom Enclosure
Posted By: Prophit
Subject: Custom Enclosure
Date Posted: August 14, 2004 at 7:35 PM
OK im a stupid newbie when it comes to building custom enclosers. I have been reading about how to make them to fit the specs of my subs but its not working to well. This is what i have 2 Alpine 10's SWR-1041D. The specs for Recommended Sealed Box Volume is 0.5~0.8f^3. What that number means. I have no clue. So basicly this is going into my 300zx. Im using 5/8's MDF board. Im tring to make this box very small in hight but wanting to make up for it in length. Pretty much what im asking for is how would i figure this out?? Please respond like your talking to a 8th grader cause im very new. Thanks for your help.
Replies:
Posted By: switch_hitter
Date Posted: August 14, 2004 at 8:19 PM
Your speakers need 0.5-0.8 cubic feet of air space, each, that means you need to build your box between 1 cubic foot, to 1.6, (since its going in a 300zx, probably 1cubic foot total for the box......find out what the depth of your speakers are, and go from there, measure the space in your car where you want to put it, or can put it...then go to the Calculators section on this site, and use the calculators to figure out what size your box needs to be to get 1 cubic foot.....let me know if that helps..
Posted By: Prophit
Date Posted: August 14, 2004 at 9:08 PM
Ok so let me know if this is right.. I messured the area im going to put the box 42" width 17" depth 18" height SO my box settings are as follows 20" width, 10" height, 12" depth, with a thickness of .625 (5/8's mpf). That would = 1.02064 Interior Volume... Does that sound about right??
Posted By: audiomechanic
Date Posted: August 17, 2004 at 7:37 AM
yes, but you also have to take into concideration the air space that the sub, braces, and any curves take up. so you will want to go a little bit more than te no worrieshat.
I would try and get it closer to the 1.5 mark then you will have no worries.
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Posted By: CarAudioHelp
Date Posted: August 17, 2004 at 9:05 AM
If you're building a sealed box it will be more forgiving of incorrect volumes. Plus you can always stuff the box with massive amounts of fiberfill. As audiomechanic said, error on the high side.
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Posted By: customsuburb
Date Posted: August 17, 2004 at 9:38 AM
I would use 3/4" MDF because the 5/8 will probobly flex. I believe prophit already took into acount the thickness of the wood (enter the dimensions he gave into the box volume calculator on here and you get the same interior volume) but not the displacement of the sub itself. The displacement of the 10" type R when front mounted is .92 cf, so if he uses 3/4" MDF (and takes into acount the displacement of his sub) he will get .87 cf as his interior volume, which is pretty close to spec.
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Posted By: CarAudioHelp
Date Posted: August 17, 2004 at 10:06 AM
Why do you think 5/8" will flex?
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Posted By: customsuburb
Date Posted: August 17, 2004 at 5:05 PM
Well the Type R isn't exactly a small sub, and 5/8" is getting on the thin side for sub enclsosures. It might flex it might not. If you braced it I'm sure it wouldn't but I would use 3/4" just to be safe.
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