In my experience I have never been in an untreated room that did not emphasize the upper mid’s and hi’s. You also have a room gain imbalance with the right speaker being 15’ from the side wall, which will help de-emphasize the lower frequencies on that side. Also our ears are less sensitive to lower frequencies at lower volume levels. In my opinion you have three things working against you, but I think room treatments is by far the best place to start.
Listening Room or Components or my ears?
My system is sounding a bit harsh, hard, shrill. (Cronus Magnum lll Amp, Focal Aria 948 Speakers, Denon DCD 1700NE CD Player, Shunyata Gamma Cables). It is just CD play back at 1/3 volume. It's a basement, L shaped room. Carpeted cement floors. The Speakers are 3 foot from rear wall. Left speaker 2 foot from side wall. Right speaker is 15 foot from side wall. Speakers are silghtly toed in and a 6 foot apart. Equipment rack and two subs between them. The wall behind the speakers is covered in framed posters. Is this an obvious fault? The walls themselves are wood paneling. Is there a problem with only one apeaker next to a side wall? Ant thoughts or suggestions? Thanks