Thiel Owners

I think there can be a little too much emphasis on doubling into 4 ohms.  This is related to gain and I think the total power of the amplifier is a better way to think about it.  There are well respected amplifiers that don't double.  Ayre, for example.  I'd consider two amplifiers that put out 300 watts/channel into 2 ohms comparable, even if one is rated 75 watts/channel and the other 100 into 8 ohms.  The 75 watt one doubles twice while the 100 watt/channel one only doubles once.  The 100 watt amp will, however, put out 75, 150 and 300 watts into 8/4/2 ohms.  

TomThiel,Would you be able to supply a short list of amps that actually do double and double again into 2 ohms. I've been pretty happy with a Classe CA-300 pairing with my 3.7s, but now have started to worry!The Classe is rated 300 8 ohm, 600 4 ohms, but no rating into 2 ohms.Thanks in advance for any input.

the big PS Audio 300 monoblock can almost do it. these things can drive anything.   i use the 250 stereo amp on my 3.7's and they do great.
Signature 300 Mono Amplifier Output Power120vac mains, 1kHz, 1% THD 8Ω300W minimum 4Ω600W minimum 2Ω 1000W