Thiel Owners

Actually the ceiling is 25+ feet. The Width is 12 and Length is 21 feet. It is impossible for me to put the speakers along the long wall. California homes for the most part are not audio friendly.

Do you think the short wall (with non-uniform side wall distance) is a no go for the 3.7? I have some other speakers I am considering for this space but I wanted to investigate the 3.7 first.

The Yamaha NS 5000 is one speaker I am considering and that has foam plug on the back that can do some tricks when 1 speaker is not the same distance from the side wall as the other.

Another speaker under consideration is the Paradigm Persona 9H with it’s bass management.

I have 3.7s and in my old house I had 19 foot ceilings with about a 16x20 ft. room that opened into other spaces (there was a foyer, an opening on one side of the back of the room to the kitchen and a stairway that led to an upstairs hallway that had a half wall along much of it) and didn't have an issue.  The current room is about 16x18 with a 10-11 ft. ceiling and the left side is open to a foyer and a dining room and the back is mostly open to a kitchen area and no horrible issues.  However, that being said with both those situations, I do have sound treatments.  Not enough to make it look like a studio (and I do that in all of my systems as the room tends to be overlooked by so many) but enough to mitigate the bad issues.  There's a pic of the rack and the speakers here -  https://systems.audiogon.com/systems/8093#&gid=1&pid=1

@cascadesphil

Have you tried the rack on a side wall (maybe with amp on the floor between the speakers) or pulling the speakers more into the room, away from the rack?
Could make a difference in imaging.

Don't have any side walls (or even a back wall - there's a small portion of a back wall where the fridge is behind it in the kitchen).  To the right of the right speaker is basically a whole wall triple sliding glass door (covered by window treatment).  I already noted the space is open on the left side (foyer by the front door and dining room and no walls separating them from the living room).  It's an integrated AV system, so that also makes a difference on speakers placement and why the rack was custom built to my design the way it is..  The speakers image great where they are.  I've had them back a bit more and forward a bit more as well and they are best where the current listening chair is via listening and measurement.  The space behind the listening chair has several feet behind it and is open to the kitchen via a half wall.  I have a sound treatment sitting on top of the half wall separating the kitchen.

Given some of the recent posts about cable upgrades, I wonder if you notice that the "larger" the system, the more apparent the difference makes.  For example, if you have small monitors in a small room vs. a large system such as a real four way speakers in a large area room, any upgrade such as cables will make more of a difference.  

Let's take this analogy.  If you have two digital pictures with different resolution, says one is 0.3 megapixel and one is 7megapixel, and zoom them on to two large computer screens, the difference in quality will be very apparent and the 7megapixel will have superior picture quality vs. the .3megapixel.  But now if you display these two same pictures on very small computer monitors, the difference is not quite apparent and it is related to the picture resolution.

Now back to audio system, the larger the system will expose the quality of the equipment better because the sound will have to be projected in a larger air volume vs. a small systems.  The difference will be amplified in a large system in similar way with pictures.  I think that's why different people will perceive the same set component differently and some say the difference is significant while others may say the difference is minimal.  From personal experience, I used to have a small system in a small room and it was hard for me to tell the difference, but now I have a much larger living room and much more high end system and any differences from different components are very easy to tell.  Not only that, any difference when the system not fully warmed up is also very easily to tell.

Of course we have to consider the affects of "subjectivity", but what I said above plays a significant roll in how the sound is perceived.