I feel well educated enough. How about *you* elaborate on *your* argument, instead of rather pompous curt replies like this. You took reservation over “synergy” so I’d simply like to make sure I get your meaning. I can best do that with information about your point that isn’t so abridged.\n\n\nSent from my iPad using Tapatalk\n\n \nI think what he is getting at is that with moving coil speakers the issue tend to be the angle between voltage and current turning negative. This presents a particular problem if a dip in impedance coincides with a phase angle of -ve 45 say.\n\nElectrostatic speakers present a capacitative load where the phase angle often turns positive in the high frequencies especially. This can and does result in some amps going into ultrasonic oscillation. Because it is ultrasonic you can not hear it. This usually blows up the amp. It can also damage the speaker. So if you are going to use electrostatic speakers you need to choose your amp with care. I would not drive one with a receiver for sure. To get the best results from an electrostatic speaker then Quad amps are strongly recommended as they are specifically designed to tolerate these difficult loading conditions. The Quad warranty has always said, "guaranteed to be stable under all loads."