I've sold/owned Thiel's for years. What you have MAINLY, is an acoustical/system setup challenge!....I garantee it.
You are dealing with what so many (ok, most) people deal with every day. Their setup, speaker and seating possition, and their relation is the main and foremost problem, from a foundational standpoint. That and their acoustics overall in the room are not effective to that set up either. Added up, improper speaker, seating, and acoustical treatment considerations will give you AWEFUL SOUND EVERY TIME! From what I'm assuming from your description(although you didn't specify ceiling and floor situation, or sidewall/back wall/front wall specifics), you have some major challenges(the room, setup, speaker, seating placement, acoustic treaments, structural challenges, calibration/tweaks are easily 2/3's the battle sonically!...no joke).
Your room is not 13x18 if you have no left wall, which opens up to the next room(how big is that connection/opening/doorway/whatever?). Your room is acousticallly much bigger, and your dimmensions acoustically are differnt.
How high is your ceiling? What's on your floor and sidewall (right speaker), back and front wall?...bare?
As it stands, you have different(likely radical) frequency response for your left speaker than your right(and vice versa). The right speaker is getting a likely double reflection back to your ears immediately after your direct response from the speaker. This blures and softens image, obscures detail, etc. Your left speaker is more out in "open space", and is giving a differnt signature than your right speaker. If you have a low ceiling, and sit back a ways, you will also have to deal with another reflection issue, with similar affects (assuming flat ceiling).
You couple that with reverb issues, other reflection(non-treated surface) issues, room modes, balance issues, etc, and you have problems.
I bet if you took your same gear, and put it in another room/setup, and you'll get different results!...assuming better setup.
If you can't switch your set up around, and address acoustics issues, you will only go so far with ANY SYSTEM!
Good luck
You are dealing with what so many (ok, most) people deal with every day. Their setup, speaker and seating possition, and their relation is the main and foremost problem, from a foundational standpoint. That and their acoustics overall in the room are not effective to that set up either. Added up, improper speaker, seating, and acoustical treatment considerations will give you AWEFUL SOUND EVERY TIME! From what I'm assuming from your description(although you didn't specify ceiling and floor situation, or sidewall/back wall/front wall specifics), you have some major challenges(the room, setup, speaker, seating placement, acoustic treaments, structural challenges, calibration/tweaks are easily 2/3's the battle sonically!...no joke).
Your room is not 13x18 if you have no left wall, which opens up to the next room(how big is that connection/opening/doorway/whatever?). Your room is acousticallly much bigger, and your dimmensions acoustically are differnt.
How high is your ceiling? What's on your floor and sidewall (right speaker), back and front wall?...bare?
As it stands, you have different(likely radical) frequency response for your left speaker than your right(and vice versa). The right speaker is getting a likely double reflection back to your ears immediately after your direct response from the speaker. This blures and softens image, obscures detail, etc. Your left speaker is more out in "open space", and is giving a differnt signature than your right speaker. If you have a low ceiling, and sit back a ways, you will also have to deal with another reflection issue, with similar affects (assuming flat ceiling).
You couple that with reverb issues, other reflection(non-treated surface) issues, room modes, balance issues, etc, and you have problems.
I bet if you took your same gear, and put it in another room/setup, and you'll get different results!...assuming better setup.
If you can't switch your set up around, and address acoustics issues, you will only go so far with ANY SYSTEM!
Good luck