I have a Thiel 3.6 as well being driven by a Krell FPB200 and so far I only have one tweeter go bad on me in almost 2 1/2 years that I have it.I called Thiel and they shipped me a new one right away after I called and told them about it.Give them a call and I'm sure they will give a better answer than any of us here.Thiel is one of the best when it comes to customer service.
On a side note I also read on another forum about somebody who had the 3.6s and had 3 or 4 sets of mids and tweeters go bad in a couple of years time. If I remember it correctly he sent them back to Thiel and they found that their's something wrong with the speakers crossover. Thiel fixed the problem and he never had a driver go bad on him since.
On a side note I also read on another forum about somebody who had the 3.6s and had 3 or 4 sets of mids and tweeters go bad in a couple of years time. If I remember it correctly he sent them back to Thiel and they found that their's something wrong with the speakers crossover. Thiel fixed the problem and he never had a driver go bad on him since.