Thiel Owners

My experience with 3.7s and amps has been that when I got them I had a single Cambridge 840w.  This is rated at 200 watts into 8 ohms, 300 watts into 4 ohms.  It's not a monster amp but not tiny either.  It worked ok but I did blow a midrange, not sure if it was due to clipping or not but it seems likely.  Then I got another identical amp and ran them bridged mono for 600 or so watts into 4 ohms and I've been running them that way ever since.  When I added the second amp I was surprised at how big of a difference it made in the bass.  The definition was better even at moderate volumes. 

Jon, your experience coincides with mine and many, many more in my experience. The fact that the amp doesn't double into 4 ohms says that it is out of power as current demand increases. Thiel speakers have low impedance for high current appetite , especially in the bass. So, doubling your available current in the bass is germane. Your blown midrange was almost certainly caused by distortion which heated the midrange voice coil beyond its limits.

As an aside, the only driver failures I have seen have been burned voice coils, caused by overheating, caused by distortion. In all the years of heavy-duty, overnight, stress and show conditions, I am not aware of ever "blowing" a Thiel driver. We had big amps with high current delivery power supplies.

Much Thanks! dhoff01Happy Listening!

Good to see you  - tomthielHappy Listening!