bracing a floorstander

jericho_tm · 30th January 2006, 10:07 AM

I whant to build a 2.5 way floorstander. I saw all that about 2.5 way system that's been written on this forum.

But, how about braces?

how do you calculate them?
where do you place them in a floorstander enclosure?
I saw many projects about this on the web and all enclosure of this type had braces! But nothing about the detailes of brace construction
Thank you, for your patience!
sorry, for my bad written english!

badman · 30th January 2006, 01:54 PM

Calcluating braces.... naw, not necessary. If you use a number of braces that couple the panels together, and join together themselves (interlocking braces) you can make an extremely rigid cabinet. Just look at some of the threads where people have built good cabs, and follow their lead. Make sure you account for the change in interior volume with braces included. It's all very dependent upon application. In your instance, I would give the midwoofs separate enclosures, that's a good start, and use at least one shelf brace per enclosure.

jericho_tm · 30th January 2006, 05:07 PM

thanks

you're not such a 'badman' after all...

rabbitz · 31st January 2006, 11:39 AM

Just don't put the bracing on the centreline of the panel so you break the panel into equal sizes. Move it so each panel is a different size and will resonate of different frequencies. Think of golden ratios as a guide such as 1:1.44, 1:1.26 etc.

pinkmouse · 31st January 2006, 11:41 AM

Angles are good too, but require a little more thought and woodwork!

jericho_tm · 2nd February 2006, 08:34 PM

thank you, very much for the link!!!

, rabbitz

rabbitz · 3rd February 2006, 12:30 PM

Which link????

kifeinthesink · 5th February 2006, 03:58 AM

if you can get your hands on the last audioXpress magazine there is an excellent article on bracing.

Basically, the general idea was that three vertical braces running the length of the panel significantly decreased panel vibrations. Bracing that divided the panel into square sections had the least benefit.

I suspect that building your panels with a sandwich construction of 3/4" mdf, roofing felt, and masonite, would also help. This is called constrained layer damping and is commonly used for vibration control.

jericho_tm · 5th February 2006, 06:07 PM

This link www.rzaudio.com , rabbitz

30th January 2006, 10:07 AM	#1
jericho_tm diyAudio Member Join Date: Jan 2006 Location: Iassy	bracing a floorstander I whant to build a 2.5 way floorstander. I saw all that about 2.5 way system that's been written on this forum. But, how about braces? how do you calculate them? where do you place them in a floorstander enclosure? I saw many projects about this on the web and all enclosure of this type had braces! But nothing about the detailes of brace construction Thank you, for your patience! sorry, for my bad written english!

30th January 2006, 01:54 PM	#2
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	Calcluating braces.... naw, not necessary. If you use a number of braces that couple the panels together, and join together themselves (interlocking braces) you can make an extremely rigid cabinet. Just look at some of the threads where people have built good cabs, and follow their lead. Make sure you account for the change in interior volume with braces included. It's all very dependent upon application. In your instance, I would give the midwoofs separate enclosures, that's a good start, and use at least one shelf brace per enclosure. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

31st January 2006, 11:39 AM	#4
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Just don't put the bracing on the centreline of the panel so you break the panel into equal sizes. Move it so each panel is a different size and will resonate of different frequencies. Think of golden ratios as a guide such as 1:1.44, 1:1.26 etc. __________________ No longer DIY active

31st January 2006, 11:41 AM	#5
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Angles are good too, but require a little more thought and woodwork! __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

3rd February 2006, 12:30 PM	#7
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Which link???? __________________ No longer DIY active


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30th January 2006, 05:07 PM	#3
jericho_tm diyAudio Member Join Date: Jan 2006 Location: Iassy	thanks you're not such a 'badman' after all...

2nd February 2006, 08:34 PM	#6
jericho_tm diyAudio Member Join Date: Jan 2006 Location: Iassy	thank you, very much for the link!!! , rabbitz

5th February 2006, 03:58 AM	#8
kifeinthesink diyAudio Member Join Date: Oct 2005 Location: Guelph, Ontario	if you can get your hands on the last audioXpress magazine there is an excellent article on bracing. Basically, the general idea was that three vertical braces running the length of the panel significantly decreased panel vibrations. Bracing that divided the panel into square sections had the least benefit. I suspect that building your panels with a sandwich construction of 3/4" mdf, roofing felt, and masonite, would also help. This is called constrained layer damping and is commonly used for vibration control.

5th February 2006, 06:07 PM	#9
jericho_tm diyAudio Member Join Date: Jan 2006 Location: Iassy	This link www.rzaudio.com , rabbitz

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