what size mdf for a sub ring

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=107062
Printed Date: May 12, 2025 at 3:35 PM

Topic: what size mdf for a sub ring

Posted By: ratjack2k5
Subject: what size mdf for a sub ring
Date Posted: August 26, 2008 at 10:43 PM

I am going to be making a fiberglass enclosure for a 12" sub. I want to make it with one ring on top of the other so the sub can sit down and be flush with the box. I bought 3/4" mdf but think with it being so thick it will look like the sub is sinking into the enclosure. should I do a thinner piece? what would be a good size? 1/2"?

Replies:

Posted By: jar754
Date Posted: August 26, 2008 at 10:56 PM

3/4 is good however it depends on the weight of the sub like a 13w7 you would want to double up on the rings making it 1.5 in thick

Posted By: ratjack2k5
Date Posted: August 26, 2008 at 11:01 PM

I have a kicker 12" CVR. you do know what im talking about making it sit flush right? so the sub goes down.

Posted By: jmelton86
Date Posted: August 26, 2008 at 11:35 PM

For a CompVR 12, 3/4" is fine.

I always like to double it up, though... if possible, do it.

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2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

Posted By: ratjack2k5
Date Posted: August 26, 2008 at 11:46 PM

what do you mean by double it up? this is what im looking to do. https://volvospeed.com/Mods/speaker_rings.htm

if i do it like that with the 3/4 mu sub is going to sink down into the enclosure about 1/4" the outside of my sub is only 1/2" in depth. wouldnt that look kind of funny? rather than doing like 1/2" and having it almost perfectly flush with the fiberglass enclosure?

Posted By: jmelton86
Date Posted: August 27, 2008 at 12:03 AM

Oh, I thought you were talking about the actual baffle board that the sub mounts to.

For this case, I think 1/2" would be sufficient. It depends on how far the surround is from the baffle -how far it sticks out from the baffle. Measure this, then use that thickness of wood.

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

Posted By: ratjack2k5
Date Posted: August 27, 2008 at 12:11 AM

ok, now I am new to alot of this stuff. What is the baffle?

Posted By: jmelton86
Date Posted: August 27, 2008 at 12:39 AM

It's the actual board that the sub bolts to -the front of the box, on regular square boxes.

-------------
2013 Kia Rio -90a alternator
DDX470HD GTO14001 GTO1014D (x3)
Big3 in 1/0G
1/0G to GTO14001

Posted By: ratjack2k5
Date Posted: August 27, 2008 at 1:10 AM

ok i get it. thank you, I really appreciate your help.