2. misc-audio
  3. 1074739543

Need help with acoustic treatment for brightness.

I have switched back to my Forte Model 40 preamp (Pass designed). I like it for it's fantastic detail. However it has given my system a mild brightness issue at around 5000Hz. I have read that absorptive material at the first reflection point can help tame this. In my case, the primary first reflection point is on the ceiling so the solution is not as simple as hanging a rug on the wall. My budget is about $100 so DIY is most likely. John Marks of Stereophile uses RPG Skyline diffusors on the ceiling for his speakers. Could diffusion tame brightness? If not, Is absorption the key? I've used a lot of interconnects and that doesn't solve it.
holzhauer

Showing 1 response by prpixel

prpixel
876 posts
 
Hear's a real cheap and easy solution. Go over to Home Depot and buy a sheet of Hardboard (like pegboard without the holes). Cut it to the size you need (depot can do this for you). Buy some 3/4" poplar and cut it into 1" strips and staple and glue it so outside edge of the poplar is flush with the outside edge of the hardboard. Get some standard fiberglass ceiling tiles and peel off the white face. Use a little construction adhesive to secure it to the hardboard. Sand the outside edges of the poplar with some 150 grit sand paper and make sure to "break" the edges and corners so that when you stretch fabric over the frame it does not tear. Pickup some fabric at the local sewing shop and stretch it over the frame and staple to the back of the hardboard. I made 48 of these for my hometheater for less the $500.00 including the fabric (100 linear yards at $3.00 a yard)! I consulted with Rives audio so that I did not overdamp the room. I actually made some "dummy" panels by flipping them over and covering the harboard side with fabric.

Good luck,
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