Speaker Help Required

Before you move to a floor stander, I would suggest that your sub in not adding anything in the midrange. Double check the crossover setting on your sub. If you are at 80Hz or below, theory says it is omnidirectional, meaning you should not be able to tell where it is coming from.

My hunch is that with your sidewall on the left, you are getting reflections, which you are not getting from the right side. Moving to a floor standing speaker will not solve this problem. Does any of your gear have a balance feature?

I would start there. That should help correct your problem.

To prove me wrong, put your sub on the right side of the system and see what happens.

Speakers are not your problem, your problem is the opening to the hallway on the right speaker. You have the right idea, adding a door, will give added reinforcement. Since you can't add a door, how about some temporary free standing room treatment, typically you would use absorption here. You would then need another absorption panel on the left side as well. Just remove them when not listening to music.

S7horton is absolutely correct. Don't change your speakers it won't help.

I partially agree w/SNS, but not sure you need a panel on the right(movable or not). Absorption on the left is key. Take a look at my room photos. I have portable panels on my right side, that would make sense for you, too. Of course if you are going to the trouble, you might as well put them on both sides for serious listening.

There is a company that makes absortption panels that look like reproductions of famous works of art(Chagall, Monet, etc). They're kinda pricey, if I recall, but could be a lifesaver given your situation. Perhaps someone can chime in w/specifics about them. Cheers,
Spencer

Sub woofers crossed over at 80hz, assuming that the cross over slope is at 12bd per octave will still have significant output at 160hz and some at 320 hz the result of which will be an enriched sound from the left speaker in that range and will skew the balance a bit. IF, your problem is NOT related to the left speakers placement near the corner then floor standers might help because the woofer on the left will be operating 3db lower than the sub to get a balanced response with the other floorstander.

As mentioned, for reference only, move your sub to the right side and see what happens to the balance. If you have a SPL meter and a test disc it will be much easier for you and you can run the system in mono on each side to cee the difference in db's between having the woofer on the left or the right, IF there is one.

I'll mention my set up experience experience with floorstanders only to give you an idea of the things you can effect with a little time, an open mind (sonically speaking) and without having to buy any audio acoustic materiels (as opposed to domestically approved stuff). I have the same issue in my room. Wall on the left side, big double door opening on the right side at the speaker location. Room is a bit bigger than yours. Two things have helped me get an excellent sense of width, depth, and balance. The speaker on the 'wall' side is aprox 30" from the side wall and 65" from the back wall. The speaker on the right side is about 12 inches (measured at the tweeter) from the opening where the wall would be, and also 65" from the back wall. The speakers are about 9' apart and I sit about 11 ft from the plane of the speakers. I toe the speakers in so that their axis' cross in front of my listening chair. This minimizes reflections from the left wall, and I believe changes the reflection pattern from the ceiling and helps decouple it from the direct signal. The result is flat +/- 3db except for a small node at 32hz of about 5db. This location took a lot of work and time to find, but it was worth it. BTW, I have pocket doors in the opening and open v closed had little effect on my results.

FWIW. No charge! :-)