You have to have acoustic materials absorption panels with thiels to close to side walls and too far from the rear walls and short ceilings. My theta digital gear made the widest and deepest soundstage Ive ever heard from any of the thiel loudspeaker
My current system.
Sony SCD-1, Theta Gen VA, Pass Labs x-2 , X-350, Thiel 2.3s Harm Tech Pro Silway II, Pro-9, Audience Power Chords.
I also have to worry about my room measures 12 x 15 x 10 a non dedicated or closed listening room. I am using Jon Risch DIY acoustic panels (on the three(3) 1st reflection points and six(6) smaller panels on the front wall; these have made the greatest impact on sound stage depth. I also use 4 Jon Risch quick & dirty DIY bass traps. All of my materials cost less than $75.00. No tools involved. The Jon Risch DIY acoustics far exceed my expectations. Jon Risch is on the Audio Asylum. Under the Tweakers/DIY Asylum.
Enjoy, Dave