Acoustically treated dedicated listening room. Dedicated AC line to room. Custom rack has all square tubing filled with sand. Shelves are 1.5" thick butcher block and are isolated from frame with silicone. Asymmetrical setup yields smoothest bass response. Tweeters are 32" in front of front wall, 83" apart and 96" from ear position at the listening seat.
Measurements are confirmed with tape measure and laser measure.
Speakers are sitting vertical, checked with bubble level. At seated position ears are at 37" above floor, center of midrange drivers are at 40" above floor, center of tweeters are at 44.5" above floor. Speakers are toed-in about 15*, their axis crosses several feet behind the listeners ears.
Sub woofers are in phase with woofers of main speakers.
Once I got all the the absorption panels installed the position of the plants didn't make any difference in sound quality, and the depth of the soundstage remained the same regardless of the speaker positions. The bass is also very consistent where the speakers are positioned now.
