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Putting sand in a stage?


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6 replies to this topic

#1 of 7 OFFLINE   Orlando

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Posted August 03 2007 - 05:58 AM

When putting sand into a stage. Do you fill it up all the way to the tippy top? Almost to the top? Half-way or some other way? Thanks FYI the stage I have is 14" high.

#2 of 7 OFFLINE   Orlando

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Posted August 04 2007 - 07:30 AM

Nobody? I'm waiting to close up the stage.

#3 of 7 OFFLINE   BruceSpielbauer

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Posted August 04 2007 - 10:28 AM

Orlando:

Most fill it pretty much full. The first and primary reason for using it is to get rid of the large "air gap" that would result in your stage functioning like some huge hollow drum. You are trying to get rid of the "hollow," and if you leave it only halfway full, you are merely going to change the frequency at which it will pick up sound from the speakers, and continue to amplify it and extend it and cause it to reverberate.

In the many pictures I have seen, most put down plastic (often they lined each cavity between the bracing or studs with plastic liners). Then, they filled each pretty much all of the way to the top. They did not "pack it in" or try to "stamp it down" or compact it in any way. They just filled it close to the brim, and then covered it over with the top.

Also, everyone insists you must use very dry sand.

Hope this is what you were looking for,

-Bruce
-Custom Home Theater Intros on DVD: http://www.S2Digital.com

#4 of 7 OFFLINE   Orlando

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Posted August 05 2007 - 05:21 AM

Thanks Bruce, Pretty much what I thought. But you know how it is you start doing things and then start doubting yourself. Just needed some confirmation.

#5 of 7 OFFLINE   David Noll

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Posted August 06 2007 - 12:24 AM

A lot of my research said that sand was not the way to go. What I was told to do, and did, was use fiberglass insulation 2-3 times the normal amount. My stage is 5 1/2" high and I stuffed it with 12" of insulation. Sure is a lot less messy and time consuming. And it works great! David

#6 of 7 OFFLINE   BruceSpielbauer

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Posted August 06 2007 - 12:27 PM


If it is a riser, to raise seats, then regular fiberglass batts are the way to go.

If it is a stage, and if a subwoofer is going to sit on top of that stage, then fiberglass will not keep the stage from vibrating and picking up every harmonic frequency, and then "running" with it. This is when sand is required.

IF you are not placing your subwoofer on top of the stage, of course, then standard fiberglass batts will do just fine.

Hope this helps,

-Bruce
-Custmized Intros for your Home Theater on DVD: http://www.S2Digital.com

#7 of 7 OFFLINE   Orlando

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Posted August 06 2007 - 04:28 PM

Thanks guys, I will be putting my sub on it.




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