If this is about a two channel system I'm in. I don't do HT.
Tpreaves is correct regarding the entry behind the right speaker. This can act like a mini echo chamber and really mess with your sound. Clap your hands while standing in the entry and listen for unwanted echo. If echo exists you may want to treat the entry to eliminate the echo.
From your drawing you are set up correctly and I prefer the long wall, but you may want to either spread the speakers farther apart, pull the speakers farther into the room or a little of both.
If you want to know how the TV is affecting the sound you can temporarily remove it.
When making adjustments or treating your entry, be sure to do only one thing at a time. Don't do anything else until you realize how a single change affected the sound.
One thing I don't hear mentioned is the leather couch. Your leather couch is a large reflective surface right in the listening position. It is my experience that leather couches are not good for the sound. Try covering your couch with a blanket and see if you hear the difference. Leather couches affect the sound in a similar way to having a non-treated wall behind your head. I'm surprised nobody has mentioned this before.
I would be interested in knowing what products you are using on the wall behind the speakers and the wall behind the listening position. A good rule to follow is "live end dead end". In other words, if you are treating the wall behind the listening position don't treat the wall behind the speakers.
Only make one change at a time.
Tpreaves is correct regarding the entry behind the right speaker. This can act like a mini echo chamber and really mess with your sound. Clap your hands while standing in the entry and listen for unwanted echo. If echo exists you may want to treat the entry to eliminate the echo.
From your drawing you are set up correctly and I prefer the long wall, but you may want to either spread the speakers farther apart, pull the speakers farther into the room or a little of both.
If you want to know how the TV is affecting the sound you can temporarily remove it.
When making adjustments or treating your entry, be sure to do only one thing at a time. Don't do anything else until you realize how a single change affected the sound.
One thing I don't hear mentioned is the leather couch. Your leather couch is a large reflective surface right in the listening position. It is my experience that leather couches are not good for the sound. Try covering your couch with a blanket and see if you hear the difference. Leather couches affect the sound in a similar way to having a non-treated wall behind your head. I'm surprised nobody has mentioned this before.
I would be interested in knowing what products you are using on the wall behind the speakers and the wall behind the listening position. A good rule to follow is "live end dead end". In other words, if you are treating the wall behind the listening position don't treat the wall behind the speakers.
Only make one change at a time.