Join Date: Apr 2019
Location: Near Cape Canaveral
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Resonance in the Listening Room
I adapted part of a Florida room 24 x 16 x 8.5 ft to a listening room on one side, 16 x 12.5 x 8.5. I installed 7.2.4 with Atmos via SVS Prime Elevation speakers located at the corners near the ceiling. and pointed at the MLP. Other speakers are located as suggested by Dolby. Carpeted floor with pad; plaster ceiling; wood paneled walls. There is no left-hand wall between this space and the rest of the room. Other deviations: behind the 108" screen, there is a 7'9" x 5' window with narrow horizontal venetian blinds, now covered by a blanket. Behind the MLP, there are sliding glass doors extending to about half-way across the back wall from the left. I can't do much about these without major remodeling expense, except maybe partially covering the back wall/door with Sonex, and maybe treating the wall/window behind the screen.
I have fooled with sound equipment over about 50 years, and after calibrating my Denon with Audyssey, I am pretty happy with the sound, listening to about a dozen different 4K Atmos movies. The bass and lower midrange seem good; I don't think I have amp or speaker problems. But there is a problem which shows up mostly on CD's . There is a high midrange peak (I'm guessing about 3-4 KHz) which makes some music and occasionally voices have a harsh edge. For example, a diapason organ note falling within it sounds shrill. A few announcers' voices have a slight kazoo-like sound. The peak seems to be pretty narrow, and the Audyssey correction curve doesn't show much, a little 3-4 db bump. I think this is caused by a resonance within the room. My prime candidates: There is a centered chandelier with five bulbs inside glass chimneys, and metal shades resting on the chimneys. There are the venetian blinds, windows and doors (when I built the speaker stands, I noticed the pipes rang, so I deadened them), and I just don't see anything else.
I presently don't have any analysis equipment. My first test is to remove the chandelier lights. If this ain't it, any other suggestions? Thanks.
Last edited by uhdnut; 06-29-2019 at 11:17 PM.