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Hello from central Illinois
Posts: 7
June 15, 2017 - 4:38 pm


Thanks Dennis for all of your help with building a great, affordable , dedicated listening room in my basement! I read all that I could from your site and bought and built plans for diffusers. My low ceiling room went from blurrry audio to clean and precise. I spend 2 or 3 hours listening to music each day. It is such a pleasure.

After 25 years in the same home, we are looking at moving to another home. I will be re-establishing a great accoustical environment there. Of course there will be all this testing and treatment again but believe me, it is worth it! I will be viewing and participating often.

Thanks again for all of your help.


Posts: 559
June 15, 2017 - 5:59 pm

Hi Don, Thank you for your comments. Maybe you could do a video telling others of the changes you are hearing. Take each thing you did and tell everyone the before and after treatment changes. If more understood the power of correct treatment, my life would be easier. It is always best to hear testimonial from an actual end user.

Posts: 7
June 16, 2017 - 3:59 pm


Sorry that I don’t have the ability to do video. I read all that I could from your site. I used a cheap Radio Shack SPL meter to find areas that needed to tame down bass build up. My area is not a room. It is basically the entire 900 sq ft basement. It has a stairway to the right of my listening area. There are many different walls, counters, closets, book shelves etc. It has a low accoustic drop ceiling. I built 4 large diffusers(QRD 11) and 2 smaller (QRD 9)diffusers. I actually have moved 2 QRD diffusers to 6 feet behind the listening area and 2 QRD 11 to 6 feet infront of the listening area along a wll on the left and the walled stair way on the right. I use the smaller QRD9s 6 ft each side aimed at my ears at 90 degrees. I used some commerial absorbers adhered to the front wall and alternating between the qrd diffusers on the side walls. I have 4 absorbers placed behind the rear QRD diffusers. I covered all glass(patio walk out glass) and windows with absorbers . I used my nice tv cabinet to stack my equipment but removed the plywood back in order to allow sound to pass through to the absorbers behind on the front wall. I added two cloud absorbers hanging from the ceiling and a 4 pack of plastic drop in qrd diffusers above my head.

The sound is holographic when I move my speakers into the room several feet. I have a tube amp that has rca output that I add adjustable quality powered sub woofer bass. It is Sweet! Everyone who visits my 2 channel area can hear a huge sound quality in clearity as soon as they descend the stairs.

Posts: 7
June 16, 2017 - 4:01 pm


What I learned most from all this treatment is that you can coax great sound from lesser stereo equipment just by properly treating your listening area!

Posts: 7
June 16, 2017 - 4:04 pm


I can only guess how much money I have spent since my high school years on chasing the best equipment. I am 61 years old now and th lesson learned is, treat your listening area first.

Posts: 7
June 18, 2017 - 6:40 am


I have a correction on the diffuser above. I bought plans and built the qrd 11s and QRD 7s.

The pre-condition of no room treatment was painfull to my ears after 10 minutes of listening because of the sound pressure. After adding bass trapping , absorption and diffusion , I can listen for hours. The detail that I now can hear is so cool. All my old music has revealed so much more detail since treatment. No more blurred detail.

Posts: 7
June 18, 2017 - 7:36 am


Link to my treated listening area.

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