Could be?
Could be your room?
Could be your set up?
I once had a Furutech IT-Reference power conditioner and it dampened sound (with my gear) and when I got rid of it sound was better; meaning I believe you. But now in one system is a Puritan Audio Laboratories PSM 156 Power Conditioner and in the other is a AudioQuest Niagara and believe me they work. Power here is dirty!
From years and years of climbing the ladder or this and that’s I know (YMMV) that shielded power cords with top materials work. I’m happy with upper level Cardas and above all Hijiri.
Likely the damping material on your walls and short field monitor set up is what’s got yah juiced and happy.
Rock on! And welcome to this bunch of well meaning folks.

