Brownsfan...that's interesting, as I heard the 3.7s a few times (I own the 2.4s) and think that one of the Thiel's fortes is timbral accuracy. The Thiels do require very high quality amplification to make them sound good, especially high current drive in the partnering amp (they are not easy speakers to drive). Do you mind my asking what amps they were partnered with when you heard them? There could have been an issue with the parntering electronics that could have caused you to perceive them to have timbral issues.
Honeybee2012...you should listen for yourself for sure to make up your own mind but be mindful that Thiels in general and the 3.7s as well will appreciate a very high quality amp (and preamp and front-end :-)) to drive them. Some other speakers are a little bit more forgiving of what is up the chain from them. The 3.7s however are so resolving that they will let you hear exactly how great or how poor the partnering electronics (and music) are.
Honeybee2012...you should listen for yourself for sure to make up your own mind but be mindful that Thiels in general and the 3.7s as well will appreciate a very high quality amp (and preamp and front-end :-)) to drive them. Some other speakers are a little bit more forgiving of what is up the chain from them. The 3.7s however are so resolving that they will let you hear exactly how great or how poor the partnering electronics (and music) are.