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Here are a couple of Room Treatment Suggestions

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steve:
I have been using inexpensive treatments with great success.

I found fiberglass and bed pillows work nicely and are very economical. Some years ago, I did an analysis and found that fiberglass is within some 6db of the best treatments.

Pillows are great for spot locations like corners, floors, and corners. Place one or more where bass or treble boost is evident. Easy to move if needed as well. Walmart has nice pillows for $3.75 each.

Cheers
Steve

richidoo:
FG comes in rolls, you can stack the rolls into a column and make an extremely powerful corner bass treatment. The rolls are densely packed for shipping so VLF can be absorbed. I use recycled cotton this way, not as densely packed and it makes so much bass I end up taking half of it away. Then my wife says get those garbage bags out of my living room then I take the rest away. Rinse and repeat about twice a year.

When I read of people wrestling with midrange echo in today's modern architectural design with big open floorplan spaces, hardwood floors, grainte countertops, leather couches, tons of windows there's no plush left to knock down some of the midrange. Rather than experiment with expensive, professionally-produced absorption panels, it is easy to throw a bunch of quilts on the floor or hang on the walls. These allow covering a large percentage of the reflective surface, albeit temporarily, enough to let you hear whether damping will help with the midrange echo before investing in professionally made treatments.

One more: if you sit in a small room with your head close to the rear wall, consider getting a single 4 x 2 BAD panel from bhphoto.com.  These are 2" thick, and they sound fantastic even when your ears are inches away. BAD panel is combination of absorbtion and diffusion. (BAD = binary amplitude diffusion.) They're expensive to cover a whole room, but one pad in that key location, or for 1st reflection points (if you believe 1st reflection needs damping) is a good investment.

steve:

--- Quote from: richidoo on August 01, 2017, 11:34:11 AM ---FG comes in rolls, you can stack the rolls into a column and make an extremely powerful corner bass treatment. The rolls are densely packed for shipping so VLF can be absorbed. I use recycled cotton this way, not as densely packed and it makes so much bass I end up taking half of it away. Then my wife says get those garbage bags out of my living room then I take the rest away. Rinse and repeat about twice a year.

When I read of people wrestling with midrange echo in today's modern architectural design with big open floorplan spaces, hardwood floors, grainte countertops, leather couches, tons of windows there's no plush left to knock down some of the midrange. Rather than experiment with expensive, professionally-produced absorption panels, it is easy to throw a bunch of quilts on the floor or hang on the walls. These allow covering a large percentage of the reflective surface, albeit temporarily, enough to let you hear whether damping will help with the midrange echo before investing in professionally made treatments.

One more: if you sit in a small room with your head close to the rear wall, consider getting a single 4 x 2 BAD panel from bhphoto.com.  These are 2" thick, and they sound fantastic even when your ears are inches away. BAD panel is combination of absorbtion and diffusion. (BAD = binary amplitude diffusion.) They're expensive to cover a whole room, but one pad in that key location, or for 1st reflection points (if you believe 1st reflection needs damping) is a good investment.

--- End quote ---

Great ideas Rich. Wish I had thought of some of those. And one can simply adjust the size of the quilt as well. All we have mentioned are inexpensive, great ways for even the novice to test without spending a dime, and can be used permanently as well.

I thought about mentioning acoustic tiles, for mid/highs. Inexpensive and can be placed at strategic locations. They do flake and break easy, but with careful attention, can work as well if one has some in storage.

Cheers

Steve

HAL:
I built two 1"x2" rectangular oak frames and suspended queen size comforters in them with fishing line.  Placed long ways against the two side walls one either side of the listening position.  Did a lot of slap echo reduction. 

rollo:

--- Quote from: HAL on August 11, 2017, 10:34:19 AM ---I built two 1"x2" rectangular oak frames and suspended queen size comforters in them with fishing line.  Placed long ways against the two side walls one either side of the listening position.  Did a lot of slap echo reduction.

--- End quote ---

   Interesting find Hal, thanks.

charles

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