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Serge, this is ironic that you make this port. Last night a friend of mine discussed exactly the subject of what alternately might be done with the vertical column and the horizontal ridge behind the listening chair.  The column and the ridge are the only direct reflectors and they need to be treated with extreme prejudice. My initial sentiment to cover them with white pyramid foam stands I however look also at alternatives. I have separate 2 reasons to look at alternatives. For the column I feel that white foam might not fork for a long run as the white melamine foam is extremely susceptive to dirt. It is enough for a person to walk once between chair and the foam on column and to touch the foam as the white foam become not white anymore. A vertical column what foam above is white but below is gray will not look/feel so pleasant. And the reason for the ridge – there is no space limit in there and I feel that I can do more attractive then juts foam covering.

The concern I have is not about reasons but about column. My listening chair might end up in a final position a bit closer to the back column then I initially thought. If so then the diffuser in there might not work and it needs some reflective space to be effective. So, the semi- diffusing foam might be the only options. A month or so ago I have cut around 400 1x1 sticks trying to render the idea or RPG Skyline

http://www.rpginc.com/products/skyline/index.htm

They were from 1” to 5” sticks and I changed the design by introduction 45 degrees and 30 degrees cuts in the end of each stick, the cuts to random directions. I call this design the “Circumcised Skyline”. I have them sitting in garbage bag somewhere in basement – I might try to employ them on the column as they are very hard diffusers. I just need to visualize how it will look like – I do not want the wall cover to look like it “too much trying”, if you know what I mean.

For the ridge I am very open to idea. The ridge might be anything diffusive and if I have an elegant idea how to make the diffuser then I would go for it. I do not mean “how to make” from point of construction but rather form a point of design. The sample that you posted I do not like. I would like it to be more airy, more extended into the room and to be more futuristic by appeal. Last night talking to a friend of my I called the concept “Extended Birds Nest” – of some kind randomizer but extended from the wall toward the mid of the room – a feet will be fine.  Here is what I illustrated the concept but it for she need some artistic supervision.

 

The inspiration came of from here:

The Cat

Rerurn to Romy the Cat's Site