Thiel speaker model range

FWIW, both the Thiel 2.7 and the bigger 3.7 work equally well in my 15ft by 13ft room. 

I have never auditioned CS2.7, but I did that for CS3.7 - when my choice was between CS6 and CS3.7.  I think mid-high ranges are
comparable in both speakers, perhaps CS3.7 give wider and more intensive mid-high ranges, although low frequencies are not comparable - CS3.7s  lack them, whereas CS6s give deep solid natural bass. I do not regret that I have chosen CS6s (the coaxes needed reparation that was done in Thiel by Rob Gillum quite well).

I also own CS3.6s and  MCS1s with Thiel smart sub for more than 10 years  already, which I also like. Before MCS1s I had some time CS1.9 that have decent high frequencies but I think their mid ranges are a bit saturated, nothing to say about low frequencies. Bookshelf MSC1s are uncomparable superior to  CS1.9 s.  

I would not hesitate to choose CS6, although if you have a small room and your amp gives  below 100 watts  then perhaps CS3.7 would be a better choice.  

Thanks! for sharing- niodari

Happy Listening!

niodari,

FWIW, from my experience of having lived with the CS6s (years ago), and now the 3.7s and 2.7s...

I agree the CS6 has more substantial bass than the 3.7s.   It was denser, more punchy, and goes a bit lower.  I remember the CS6s as giving the best bass I've ever had in my system and I still don't think anything has surpassed it overall.  (At least going on my memory).

The 2.7s are interesting because in some respects they actually remind me more of the CS6 than they do the 3.7s.  The 2.7s have that amazing dense, punchy quality like the CS6s, except it's shifted upward somewhat into the upper bass region.  And they have that CS6 like density of imaging. 

The 3.7s have, to my ear, the most refined midrange of all the Thiels I've owned or heard.  Just really low in noise, super transparent and delicate in nuance.  The midrange sounds more "complete" and lush, relative to the other models like the CS6 which have a mild reductive quality - instruments get just a bit smaller and thinner on those models, a character I tended to remain aware of when I had those speakers.  (But generally speaking, instrumental timbre and density was so beautiful, it made up for it).

And the 3.7s are by far the imaging champs.  They still image like nothing else I've had in my room (or heard from any speaker near it's size).  And they are overall the most coherent and boxless sounding of any Thiel speaker I've had or heard.  As I've mentioned before, in terms of eliminating obvious speaker colorations (e.g. hearing the box),  from top to bottom, and sounding holographic and uncolored top to bottom,with no frequency response bumps or nodes sticking out,  I honestly have never heard the equal in any other set up.  It blows me away every time I use them.

That said, I'd love to hear the CS6s again some time, just to re-visit that wonderful sound.