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post #1 of 2 Old 01-16-2013, 07:56 AM - Thread Starter
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Need some advice.
I have 24X16 room.
2 inches oc703 on the front wall.
2 inches of oc 703 (on the front 12 feet) of the side walls floor to ceiling. Back 12 feet alternating with 2 inches oc 703 and dry wall.
Back wall 4 inches cotton with plastic sheeting facing the room.
18x18 inches soffits around the room filled with insulation with paper facing into the room.
Front corner bass traps floor to ceiling.
Riser filled with insulation and stage with sand.
Bass sounds awesome. Other than that room sounds some what dead.
What can i do to make it more livlier?
I have seen every theater build in here uses only 1' oc703 on the side walls.
Do you think i have done too much by using 2' on the side walls?
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post #2 of 2 Old 01-17-2013, 04:44 PM
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Quote:
Originally Posted by HSINGH View Post

Need some advice.
I have 24X16 room.
2 inches oc703 on the front wall.
2 inches of oc 703 (on the front 12 feet) of the side walls floor to ceiling. Back 12 feet alternating with 2 inches oc 703 and dry wall.
Back wall 4 inches cotton with plastic sheeting facing the room.
18x18 inches soffits around the room filled with insulation with paper facing into the room.
Front corner bass traps floor to ceiling.
Riser filled with insulation and stage with sand.
Bass sounds awesome.

I would hope the bass sounds awesome - good job with the treatment!
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Originally Posted by HSINGH View Post

Other than that room sounds some what dead.
What can i do to make it more livlier?

The easiest route would be to add Kraft paper to some of the other absorbers in the room. This will help reflect some high frequencies while still absorbing mids and lows. Be careful not to add paper to any absorption that is in reflection points as this can end up with a worse response at the listening position.

A better option, but would be more expensive, would be to add slats in front of the absorbers of the walls. Something like this, but a wall (or half wall) full of these: http://gikacoustics.com/product/gik-acoustics-scatter-plate/ - you could just build frames encompassing wood slats, and either add them behind the fabric, or finish them for a nice look in front of the fabric. Many of Rod Gervais' designs use this concept, like this: http://hitproductions.net/wp-hitp/wp-content/uploads/2011/12/Studio-H.jpg
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Originally Posted by HSINGH View Post

I have seen every theater build in here uses only 1' oc703 on the side walls.
Do you think i have done too much by using 2' on the side walls?

Actually, it is the exact opposite! If you used 1" instead of 2" it would be even further imbalanced. Oddly enough, I'm writing an article on decay times right now - hopefully it should be published in the next few weeks. Basically, the word "dead" is in reference to the high end dying out faster than the rest of the frequency spectrum. Your room is sounding dead from too much absorptive surface area, but as stated above, this can be easily fixed by positioning reflective objects in front (and luckily, slats can give great scattering or diffusion on top of the existing absorption!)

Alexander Reynolds
GIK Acoustics
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