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Rear wall
Posts: 1
April 12, 2018 - 1:52 pm


Hi, My rear wall is 7 feet behind my listening position. I have read that 10 feet distance is needed to allow diffusion to properly open up. Does this mean I should be looking toward absorbtion or no treatment for the rear wall? Some back ground info: I have done a sonic evaluation using REW software
to determine the placement of my speakers and listening position. To my pleasant surprise the predicted locations matched the analysis after placement: The predictive model was correct based on my room size. My room is 21’2″ wide and 28′ 4″ wide. 15 foot vaulted ceiling in the middle which starts at 8 foot on each end of the room. It’s about 6900 cubic feet.

Posts: 336
April 12, 2018 - 2:48 pm

R, at 7′ distance from diffuser face to chair you can use the QD-13. At 10′ , the QD-17.

Posts: 6
October 2, 2018 - 8:25 pm


What if I have just 3Ft to the rear wall?

Posts: 336
October 3, 2018 - 8:06 am

W, Use absorption only.

Posts: 6
December 3, 2018 - 1:39 pm


Dennis Foley said
W, Use absorption only.  

Would my room sound too dead if I use absorption on the front, sides and rear, and maybe even ceiling?
My room is 15x11x8 ft.

Posts: 336
December 3, 2018 - 2:04 pm

W, Not if you use the correct rate and level of absorption for music and voice. Don’t even think of using building insulation.

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