Thiel Owners

I was wondering if the CS2.7 uses the same bass driver as the CS2.4?  At least they visually look the same and about the same size.

Andy - No 2.7 and 2.4 are not the same woofers.
Longer historic perspective answer:A new model from Thiel included new drivers, either specifically developed for the new model or trickled down from a more expensive recent product. Ex. the CS1.6 woofer was borrowed from the in-house developed CS7.2 mid-woofer. A newly named generation had new drivers.
The 2.7 woofer may use the same cone as the 2.4 (I don't know). But the 2.7 woofer was developed in conjunction with Warkwyn-Canada, along with the crossover. That development consumed tremendous costs, proving that outside engineering could not be afforded for Thiel to keep breaking new ground. In Jim's time I believe the 2.7 coax would have been a new driver based on the 3.7 concept. In fact, he spoke of developing such a 7.3 coax. A smaller diameter mid-plate would allow a higher crossover and perhaps a smaller tweeter to higher resonsnce-free extension. That hypothetical driver, along with a star cone, would then be trickled down into the model 2 - and called the 2.5, the next generation of the model 2.

The 2.7 is certainly an accomplishment, and a tribute to Home-Team- Thiel's dedication to creating a legacy worthy of Jim's 3.7 work. But it is less of a product than Jim would have engineered, given the time.

George - Nice system, nice room, and good solution.

Unsound - I am being excruciatingly careful to avoid editorializing the sound. We called what many brands do "euphonic engineering" - to knowingly alter the sound-field for desired illusions.
A look behind the curtain: I used my modified CS1.6s as sound reinforcement for a live acoustic concert last night in our 12,000 cubic foot Village Arts Center. As usual during sound check, I compare the unamplified house sound to that in the headphones (Beyer770Pro), to that through the speakers. The naturalness was comment and question-worthy from the musicians, two attendees and the house manager. To date there are no changes to drivers or electronics or cabinet walls. The baffle surfaces have been modified for a qualitative improvement which genuinely pleases and encourages me. 

Tom,

You've talked me into a pair of 800s cans.  Thanks!!
So now I have the  008s and the  800s .Really causes a dilemma, as both are excellent. I'll still use the electrostatics to check new CD s, but most likely will use the 800s for pleasurable listening, as they make the soundstage in the 600s appear cramped, and with less HF resolution. (Female voices sound much better.)

George