I think this is what you're looking for:
http://www.wolcottaudio.com/WA_presence.htm
but that said, I'm wondering why you think you need so much horsepower to drive Sashas?
I also want to mention, that if you were driving your Quads through Cardas Golden Reference speaker cable, then the Quads didn't stand a chance of delivering truly great electrostatic performance, because electrostats need to be driven with very low capacitance speaker cable; less than 20pF (picofarads) per lineal foot. And if you'll go to the Cardas website and look up the specs for his Golden Reference speaker cable, you will discover it's capacitance is a whopping 216pF per lin.ft. -- about ten times what an electrostat should be looking at. Electrodynamic drivers (cones, domes, and ribbons) would prefer low inductance. And if you are using a tube amp (with output transformers) additional inductance in the speaker cable can (negatively) affect the amp's damping capability and thus its ability to produce really clean bass, no matter how much power it has.
http://www.wolcottaudio.com/WA_presence.htm
but that said, I'm wondering why you think you need so much horsepower to drive Sashas?
I also want to mention, that if you were driving your Quads through Cardas Golden Reference speaker cable, then the Quads didn't stand a chance of delivering truly great electrostatic performance, because electrostats need to be driven with very low capacitance speaker cable; less than 20pF (picofarads) per lineal foot. And if you'll go to the Cardas website and look up the specs for his Golden Reference speaker cable, you will discover it's capacitance is a whopping 216pF per lin.ft. -- about ten times what an electrostat should be looking at. Electrodynamic drivers (cones, domes, and ribbons) would prefer low inductance. And if you are using a tube amp (with output transformers) additional inductance in the speaker cable can (negatively) affect the amp's damping capability and thus its ability to produce really clean bass, no matter how much power it has.