Dedicated room suggestions

I have a friend with new Cornwall 4s in a room of the same size only more square

which is worse. Untreated everything sounded horrid. 

The speakers you have are designed to do well against the back wall so  you

have that plus. He added absorbing panels, diffusers, carpet and ceiling treament.

The room went from a hell hole to one with great sound.

Measuring will maximize the sound.

The general rule of thumb is to use the short wall, unless the short wall is so short you can’t get a good equilateral triangle between yourself and the speakers. 

Thanks again all. It will take some time to get the room finished but I will certainly check back in with results when the time comes. This is pretty exciting as my system sounds pretty great now unless the recording is just horrid  i even listened to some tracks from Back In Black last night that sounded pretty darn good now that everything is burning in  I wasn’t hearing that shrill harshness that was present earlier. The current room is a bonus room with the speakers facing the finished wall, and the wall behind the speakers and amp is the half wall for the staircase leading into the room  Initially, simply because I had the tv stand the opposite way, I had the speakers facing that half wall  Simply flipping everything made a large and noticeable difference  I can only imagine an enclosed and properly treated room  

Hi, I have Crites speakers which are about the same dimensions and efficiency  I have been tweeking my system for 3 years.  Slowly and surely I have improved the sound.  My room is 12 × 21.  That is about the minimum width.  Here are some suggestion:

1.  Keep dimensions from sidewall and back wall different.  I  found the center of the speaker to measure during setup.  They are toed in to intersect behind my head. I would not put them against the back wall.  

2.  Room treatments.  Most important are the sidewalls.  I have 2 bass traps but am told a couple more would help.There are several good companies.  

3.  Speaker isolation.  I  bought springs on Amazon.  A very nice improvment.  You can spend much more.

4.  Lower noise floor on streaming system.

5.  It is best to keep equipment behind speakers or somewhere else.

I enjoyed a number of great comments and responses here. I can only add something I saw on Amazon (yuk) of all places. Acoustic curtains. They were VERY inexpensive and SAID to have many good sound enhancing qualities. As an apartment dweller I might look into a couple of those. If y look into their clams they are NOT just for soundproofing and even if they were, the same things that enhance sound proofing are good qualities for SOME sound enhancements in a listening environment.
https://www.amazon.com/s?k=acoustic+curtains+soundproof&crid=LHGS8AGRTKLM&sprefix=accoustic+curtains%2Caps%2C186&ref=nb_sb_ss_deep-retrain-50-ops-acceptance_1_18