Long wall due to room configuration limitations.Do you sit on the long wall or short wall?
Wouldn't mind a look-see at the rest of the room, and those "configurations limitations".
Usually over time, a getting-use-to-hearing situation kicks in, with having to encounter a certain sound effect. This is oft the case when caps tend to wear over time and the listener adjusts to the change, and it isn't discerned, so this might happen to you as well.
Then with the passage of time (longer periods) the ability to hear the upper and/or frequencies is effected to a degree, depending on the individual.
Q

The room is 17 'long by 15' wide. 4 1/2' dutch door Northeast corner rear side wall. Man door Southwest front sidewall. Door to my shop is rear wall Northwest corner. Rug is probably a wool blend oriental. This is a room I built in a barn by the way. Nothing fancy.
I've installed some very non scientific room treatment. Yes, I do hear a difference, better?How long to determine if it is really better, or not? I know every change we make can make a difference and it takes awhile for our ears/brain to adjust, but...
I'm confused, are these the before photos?The room is 17 'long by 15' wide. 4 1/2' dutch door Northeast corner rear side wall. Man door Westsouth front sidewall. Door to my shop is rear wall Northwest corner. Rug is probably a wool blend oriental. View attachment 3803723View attachment 3803724View attachment 3803725