The closer your head is to the wall, the more important the absorbing treatment becomes. Acoustical foam can work quite well, if it's overlapped with something like natural wool. This can have decorative advantages as well.
Can quality sound be had using the short axis in a medium sized room (12X15) ??
I have read and was told that short axis speaker set-up will not as a rule produce good sound. Supposedly there are too many anomalies in this type of set-up, mainly the listener will be at a shorter distance to the speaker plane and midpoint between the speakers
Realistically, I have about 13 ft of usable long wall to the corner Placing speakers on the long wall axis to my seated listening position is approximately 7.5 ft allowing speakers to be placed NO MORE than 14 inches (or less) from the back of the wall.
Also are there speakers (either floorstanders) or monitors) that can produce quality sound that close to the back wall.
Advice and recommendations will be great appreciated
Thank you, S.J.