Cabinet bracing idea

stephenmarklay · 17th January 2010, 09:40 PM

...Moved from a different thread.

I am putting together some mini monitor cabinets. I am "relocating" some drivers that currently reside in some 3/8 particle board cabinets. Needless to say mine will be a bit more rigid... However, in an effort to keep the cabinets small I don't want to add too many braces that will take up too much volume. I will have a couple regardless.

What I was thinking about was building a ladder type structure on the side walls. A drawing would make this easier to understand. The idea is to attach to the walls some 3/4 x 3/4 ply in lengths and a few to span the space between them. Think of the letter H with a few more sections. This would add a lot of stiffness (The ply is turned on edge and is much stiffer this way.) divide the panel in many more sections (raise the resonance up even higher) and not take up nearly the cabinet volume.

Ok now tell me that everyone has already done this once

Moondog55 · 17th January 2010, 10:15 PM

If you are describing what I think you are, yes you're right, it has been done before

rcw · 17th January 2010, 10:42 PM

A thing I have used is u section aluminium extrusion, 25x25mm. 3mm. thick.
Epoxied and screwed to the walls this is a brace that is around eight to ten times stiffer than any wooden one and really does effectively break the panels up into smaller ones.
rcw.

stephenmarklay · 18th January 2010, 02:52 AM

I am not surprised it has been done but a little surprised that it is not done more. I will try routing out a 4 grooves in each panel and gluing in a support. That would make for 9 smaller panels. Basically free so its worth a try.

Moondog55 · 18th January 2010, 04:44 AM

Free is good, just make them all unequal

stephenmarklay · 18th January 2010, 02:24 PM

Thats the plan.

Borat · 19th January 2010, 06:40 AM

Quote:

Originally Posted by stephenmarklay

...Moved from a different thread.

I am putting together some mini monitor cabinets. I am "relocating" some drivers that currently reside in some 3/8 particle board cabinets. Needless to say mine will be a bit more rigid... However, in an effort to keep the cabinets small I don't want to add too many braces that will take up too much volume. I will have a couple regardless.

What I was thinking about was building a ladder type structure on the side walls. A drawing would make this easier to understand. The idea is to attach to the walls some 3/4 x 3/4 ply in lengths and a few to span the space between them. Think of the letter H with a few more sections. This would add a lot of stiffness (The ply is turned on edge and is much stiffer this way.) divide the panel in many more sections (raise the resonance up even higher) and not take up nearly the cabinet volume.

Ok now tell me that everyone has already done this once

i don't see anything original or particularly effective about this.

the most volume and material efficient way to build a cabinet is to CURVE the panel as here:

Revel Salon2 - Product Information

and here:

800 Series Diamond | Bowers & Wilkins Speakers

this eliminates the need for bracing completely as well as maximizes internal volume and minimizes material use all at the same time.

when you invent something smarter than that - let me know

stephenmarklay · 19th January 2010, 12:39 PM

Borat- not everyone has infinite wisdom such as yourself.

I never said it was original. I only asked it it looked liked it would be effective. I think that it will be very effective and a lot easier for me to construct with simple tools.

MJL21193 · 19th January 2010, 01:41 PM

Easier and more effective is to cut this brace from a full panel:

117.PNG

which goes from side to side, top to bottom.

Cal Weldon · 19th January 2010, 01:50 PM

More effective? Yes. Free? Probably not. Free is good.

17th January 2010, 09:40 PM	#1
stephenmarklay diyAudio Member Join Date: Nov 2009	Cabinet bracing idea ...Moved from a different thread. I am putting together some mini monitor cabinets. I am "relocating" some drivers that currently reside in some 3/8 particle board cabinets. Needless to say mine will be a bit more rigid... However, in an effort to keep the cabinets small I don't want to add too many braces that will take up too much volume. I will have a couple regardless. What I was thinking about was building a ladder type structure on the side walls. A drawing would make this easier to understand. The idea is to attach to the walls some 3/4 x 3/4 ply in lengths and a few to span the space between them. Think of the letter H with a few more sections. This would add a lot of stiffness (The ply is turned on edge and is much stiffer this way.) divide the panel in many more sections (raise the resonance up even higher) and not take up nearly the cabinet volume. Ok now tell me that everyone has already done this once

17th January 2010, 10:15 PM	#2
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	If you are describing what I think you are, yes you're right, it has been done before __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

18th January 2010, 04:44 AM	#5
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Free is good, just make them all unequal __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

19th January 2010, 01:50 PM	#10
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	More effective? Yes. Free? Probably not. Free is good. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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17th January 2010, 10:42 PM	#3
rcw diyAudio Member Join Date: Jul 2005 Location: sydney nsw	A thing I have used is u section aluminium extrusion, 25x25mm. 3mm. thick. Epoxied and screwed to the walls this is a brace that is around eight to ten times stiffer than any wooden one and really does effectively break the panels up into smaller ones. rcw.

18th January 2010, 02:52 AM	#4
stephenmarklay diyAudio Member Join Date: Nov 2009	I am not surprised it has been done but a little surprised that it is not done more. I will try routing out a 4 grooves in each panel and gluing in a support. That would make for 9 smaller panels. Basically free so its worth a try.

18th January 2010, 02:24 PM	#6
stephenmarklay diyAudio Member Join Date: Nov 2009	Thats the plan.

19th January 2010, 12:39 PM	#8
stephenmarklay diyAudio Member Join Date: Nov 2009	Borat- not everyone has infinite wisdom such as yourself. I never said it was original. I only asked it it looked liked it would be effective. I think that it will be very effective and a lot easier for me to construct with simple tools.

19th January 2010, 01:41 PM	#9
MJL21193 Account disabled at member's request Join Date: Mar 2007	Easier and more effective is to cut this brace from a full panel: 117.PNG which goes from side to side, top to bottom.

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