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kyle_300zx 
Member - Posts: 6
Member spacespace
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.
whiterob 
Copper - Posts: 351
Copper spacespace
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.
squires500 
Member - Posts: 47
Member spacespace
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??
kyle_300zx 
Member - Posts: 6
Member spacespace
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.
i am an idiot 
Platinum - Posts: 13,693
Platinum spaceThis member consistently provides reliable informationspace
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
whiterob 
Copper - Posts: 351
Copper spacespace
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.
squires500 
Member - Posts: 47
Member spacespace
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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