Thiel Owners

Sqmlaw - the DR8 and 9 are quite similar except for the power output. If you like the amps and if they don't need recapping, you are better off than most music lovers. Power requirement rises dramatically for large rooms and loud levels. If it sounds good to you, you may be within the requirements of your room and levels. Enjoy.

Tom,
What, for reference sake, is your definition of "large room."  For example, ours is 20x20x8. Fortunately, the room is within an open layout floor plan, so there are openings on three of the four sides.
Thanks for the input.
Todd

@Tom. If I ever get my recapped Classe's back from the shop, I'll report. DR6 pre and pair of DR9 power that I've had since the late 80s.  
 Those amps are awesome.  Buddy of mine used to have a DR9. He kept for several years just because of the build quality.  Sounded pretty darn good also. 

I would call a 20' x 20' room large. Square can cause standing wave problems, but openings on 3 sides helps that a lot. No real delineations apply for "large" or "small"; the 'how much power is enough' is an ongoing unknown. But swapping amps is a big deal; but reports are consistent that more is better, all else equal, which it never is . . .  As you all know, Thiel speakers are low impedance, requiring lots of current. However, that low impedance is gracefully resistive, which minimizes the problems. Classé DR amps are true current source output stages, so they match Thiel very well.  All that said, bridged /mono configuration is less friendly to low impedance loads than normal mode. So, it's a soup, and I suspect your soup tastes pretty good.

Additionally I am exploring bi-amping and believe that we can get better performance from those two amps via split normal mode than from bridged mono mode. Since most solid state amps can drive half the impedance in normal mode relative to bridged mono, and since Thiel loads are low impedance, my hypothesis, my experience in general and with the CS3 and house 3.5s suggests that (vertically) splitting a normal-mode amp between bass and upper registers delivers the best of all performance. You have two appropriate amps. In your shoes, I would explore vertical bi-amping rather than swapping those amps for bigger ones.

Beetlemania will soon test that hypothesis with his bi-ampable hot-rod 2.4s. Also, I will be outfitting my PPs, 2.2 and 3.6s for comparative experiments as time allows, since I have 4 channels of Classé DR9 in my rig.

I've run bridged mono and vertical biamp and I've gotten the vague impression that I prefer bridged mono.  I think the high gain contributes to dynamics.  It seems livelier.  I'm looking forward to reading how people here feel after trying both.