Acoustically preferable speaker stands behind AT screen - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 10 Old 07-20-2019, 07:35 AM - Thread Starter
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Acoustically preferable speaker stands behind AT screen

I need stands for three HTM-10s behind an AT screen. I plan to treat the area behind the screen wall with linacoustic or something similar.

I will have Monolith 12 ported subs on the floor between each stand.

Now, I imagine I the speakers stands should a) have a minimal (or even beneficial) acoustic imprint, and b) be pretty solid, not shaking from their own action.

My initial thoughts on options:
a) basic square stand with flanges at the floor and speaker, the whole thing filled with pink fluffy or sand
b) something akin to a flexi-rack (three threaded metal rods with mdf at either end
c) a non-square shape (e.g. pvc pipe) filled with sand
d) something more esoteric and possibly functional (e.g. short bass traps doubling as stands- they could be a foot deep, and they are a 18” off the wall (wall-to-speaker)

Options a and b of course could be wrapped in linacoustic as well.

Thoughts???
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post #2 of 10 Old 07-20-2019, 10:02 AM
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For my theater I used 3/4” plywood on each end, 2 2x4 running the length of the stand and then a bag of sand wedged in between the 2x4s to keep the stands quiet and still.


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post #3 of 10 Old 07-20-2019, 11:51 AM
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If you're concerned about having a hollow cavity inside the vertical portion of the speaker stand that might resonate - just make the vertical cross section a V or U shape, leaving the back open. A lot of pre-fab speaker stands are made this way and use the open back of the vertical as a place to run cable up to the speaker.

I doubt any of the construction methods you listed would have a measurable effect on sound, unless they were somehow resonating. If you are gluing up 3/4 MDF to build these, it should be dead solid. To me, nailing the speaker placement will make a bigger difference than what kind of stand the speaker is sitting on, assuming the stand is built solidly.
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post #4 of 10 Old 07-20-2019, 06:28 PM
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Why not simple DIY, MDF sand filled boxes, that position the speakers at proper height, done with a simple flat black finish?
(Dry sand bagged and sealed, that is.)
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post #5 of 10 Old 07-21-2019, 07:55 AM - Thread Starter
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Thanks all!
Apparently my Amazon purchase of a Floyd Toole book has made me overly cautious and/or thoughtful about reflections from things like speaker stands.

Simple mdf, flat black with no acoustic coating, seems to be the way for me to go.

The open V cross section is intriguing!
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post #6 of 10 Old 07-21-2019, 09:23 AM
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I doubt that is much of a factor in a small room, where you will run into room issues much more serious, much sooner, that worrying about the speaker stand and reflections from them.

And just how far down the rabbit hole do you want to go?
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post #7 of 10 Old 07-21-2019, 07:18 PM - Thread Starter
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^ There is no CHOOSING the rabbit hole
And I know you know this.

The best I can do is ask for advice, and hope the wisdom of others might pull me out of an occasional unfruitful rabbit hole.

Don’t even get me started on the math of diffusor design- spent a good 4 hours on it and just beginning to understand the properties dictating the math. However, having the patent sketches for RPG’s BAD panels- not unfruitful
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post #8 of 10 Old 07-22-2019, 06:26 AM
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basic six sided MDF box the exact foot print of the speakers, throw a bag of sand in the bottom to make it stable, bag and all. Fill the rest with insulation, attach Linacoustic or similar to the front
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post #9 of 10 Old 07-22-2019, 02:33 PM - Thread Starter
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Thanks- I had a hunch the linacoustic would still be of potential help. Also, i always assumed the whole thing needed to be filled with sand- good to know one bag’ll do me.
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post #10 of 10 Old 07-22-2019, 03:28 PM
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I made a mistake of filling the whole box with sand once, and only once, you can't move those suckers. 50lbs does the trick.
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