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I remember stumbling upon a site (I think it was Danish) that showed how to make a diffusor/absorber for the rear wall. The author used some Baltic birch plywood and 2" acoustic foam. The plywood had two rows of slots (or louvers) routed into it horizontally and then the foam was mounted behind. The whole assembly was then mounted to the rear wall of the listening room using standoffs. Does anyone have the link to that site?:help:
 

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Sorry - no. Can't for the life of me understand what they're actually trying to accomplish. Sounds like they're trying to get everything in one package (Helmholz bass absorber, polycylindrical diffusor, and HF absorber). Not thinking it's going to be very good at any of them.

Bryan
 

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Southworth,

Looks easy enought to do with a router and an edge guide.

Let me know if you make any of these - Be interested in what you think.

The sure seem to have a nice, contemporary look to them.

- Jack
 
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