Gbmcleod, I will have to put the Power Supply Chip on the main cable rather than the box. This is difficult as the breaker box is in my wife's closet.
I have a copy of Master Handbook of Acoustics and had built 14 of the 16" deep diffusors. I have a large 28 by 18 by 11.5 listening room but these babies took up lots of room. Ultimately, all prior room treatments were replaced by 11 Zilplex 1/2 silver bowls and got a major improvement. Don't ask me how these things work, but they are Tibetan bowls but ring beyond our hearing. There are minor tweaking that one might do with the Zilplexes, but in reality just following the recommendations they give to the letter, yields great results.
I have a copy of Master Handbook of Acoustics and had built 14 of the 16" deep diffusors. I have a large 28 by 18 by 11.5 listening room but these babies took up lots of room. Ultimately, all prior room treatments were replaced by 11 Zilplex 1/2 silver bowls and got a major improvement. Don't ask me how these things work, but they are Tibetan bowls but ring beyond our hearing. There are minor tweaking that one might do with the Zilplexes, but in reality just following the recommendations they give to the letter, yields great results.