help with further construction off cinema / music room sloped front and rear wall - Page 5 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #41 of 78 Old 05-02-13, 08:14 AM
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Re: help with further construction off cinema / music room sloped front and rear wall

Sorry. When measuring thin sheet goods, a 'mil' is 1/1000 of an inch. So .005 to .010 inch plastic. Think of a disposable drop cloth.

Bryan

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post #42 of 78 Old 05-06-13, 05:24 AM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

Hi Bryan,

Today i started reinforcing the backwall from behind but i could not manage before removing the front ply. When the front ply was removed i couild not resist taking a new measurement.

First rew graph (blue): upper and lower ply removed from backwall
second graph: (red) only upper ply removed from backwall
(green) backwall untouched

What are your thoughts and recommandations?
Attached Thumbnails
help with further construction off cinema / music room sloped front and rear wall-ply.jpg  

help with further construction off cinema / music room sloped front and rear wall-mic-1.3m-front.jpg  

help with further construction off cinema / music room sloped front and rear wall-spl-ply-backwall-removed.jpg  


Last edited by mikesp1; 05-06-13 at 05:31 AM.
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post #43 of 78 Old 05-06-13, 06:48 AM
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Re: help with further construction off cinema / music room sloped front and rear wall

what is what?

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post #44 of 78 Old 05-06-13, 06:56 AM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

A different front firing sub.
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post #45 of 78 Old 05-06-13, 07:01 AM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

rew graph with blue curves: upper and lower ply removed from backwall
second graph: (red curves) only upper ply removed from backwall
(green curves) backwall untouched, upper and lower ply is not removed
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post #46 of 78 Old 05-06-13, 07:17 AM
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Re: help with further construction off cinema / music room sloped front and rear wall

Just shifting problems around pending the room length. Really hard to tell much until we get something solid back there.

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post #47 of 78 Old 05-06-13, 07:20 AM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

Ok thanks Bryan,

Will report back when rear wall is finishes!
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post #48 of 78 Old 05-14-13, 02:29 AM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

Installed reinforced backwall.

New graph

Blue: starting point
Red: reinforced backwall two layers mdf
Black: one sub behind couch (not listenable!)

I see no improvement with new backwall, as tou can see more above on this page the 24 to 80 Hz region was almost perfect flat without lower backwall removed.

How to move further...? Superchuncks on backwall?
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post #49 of 78 Old 05-14-13, 08:09 AM
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Re: help with further construction off cinema / music room sloped front and rear wall

Looks to me like it's a sub position issue - listenable or not, that fixes the big null down low.

500-2k is also much better this way.

The wall is just providing a boundary that's more predictable. It will still need to be treated.

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post #50 of 78 Old 05-14-13, 02:51 PM Thread Starter
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Re: help with further construction off cinema / music room sloped front and rear wall

Ok Bryan,

So what do you recommend, 24" superchuncks in corner of backwall, 8" rockwool covered with plastic (surround speakers ambiance) in middle of backwall?

I can treath the left and right wall corner to ceiling with 1' chunks aswell, good idea or not?

Thanks for your kind help Bryan!
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cinema , construction , front , music , rear , room , sloped , wall

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