box supports

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kyle_300zx

Member - Posts: 6

Joined: November 01, 2009

Location: Illinois, United States

Posted: November 05, 2009 at 8:23 PM / IP Logged

I am building a sub box and I am not sure what is best to use as supports for inside the box. I was told that i could use angle iron but I am not sure if that would work very good.

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whiterob

Copper - Posts: 351

Joined: July 22, 2007

Location: United States

Posted: November 08, 2009 at 9:39 PM / IP Logged

You can just use some extra MDF you have laying around. It doesn't have to be anything special it just needs to help prevent flexing of the enclosure walls.

You could use threaded rods or similar as many people have done. I don't prefer it but it is good as it is strong but takes up very little internal volume.

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squires500

Member - Posts: 47

Joined: June 21, 2008

Location: Australia

Posted: November 10, 2009 at 6:10 AM / IP Logged

how heavy is the speaker, ive never used internal supports just glassed around mdf, but the biggest speaker ive installed were 15kg rockford fosgate t1's the boxes have broken or splintered at all.

does everyone else use internal bracing??

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kyle_300zx

Member - Posts: 6

Joined: November 01, 2009

Location: Illinois, United States

Posted: November 10, 2009 at 7:23 PM / IP Logged

I am using 2 15" Soundstream splx hx subs.

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i am an idiot

Platinum - Posts: 13,667

This member consistently provides reliable information

Joined: September 21, 2006

Location: Louisiana, United States

Posted: November 10, 2009 at 7:44 PM / IP Logged

The weight of the sub has nothing at all to do with needing internal bracing. If your box is 14 X 15 X 16, internal bracing may not help you a lot. If your box is 24 X 20 X 48 with no center internal bracing will help you more than you would imagine.

https://www.the12volt.com/installbay/forum_posts.asp?tid=116469&KW=haemphyst&tpn=1#566716

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whiterob

Copper - Posts: 351

Joined: July 22, 2007

Location: United States

Posted: November 10, 2009 at 8:56 PM / IP Logged

squires500 wrote:

how heavy is the speaker, ive never used internal supports just glassed around mdf, but the biggest speaker ive installed were 15kg rockford fosgate t1's the boxes have broken or splintered at all.

does everyone else use internal bracing??

Yeah, the bracing has nothing to do with strengthening the enclosure. It is just for keeping the walls of the enclosure from flexing. Since flexing will mean lost output you want to eliminate it as much as possible. Like idiot said, it is going to be more important when you have large panels as they will be more likely to flex.

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squires500

Member - Posts: 47

Joined: June 21, 2008

Location: Australia

Posted: November 11, 2009 at 3:09 AM / IP Logged

ahh i see i see. that makes a lot more sense thanks for the explination

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box supports

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