Quote Originally Posted by Mash
Every amp DBT I have ever read about used cone speakers for listening, and every time the conclusions, as I recall, were that the amps were DBT indistinguishable one from another.
Do share with us the specific amplifiers included in the tests to which you refer. Please don't resort to the circular reasoning fallacy that such does not make any difference.

Quote Originally Posted by Mash
One exception I remember is a high-voltage electrostatic speaker featured in The Audio Amateur c1975 which was direct-connected to a dedicated high-voltage tube amp. As I recall the high-impedance membrane was charged to 3000 volts. This speaker was described as being a killer in every sense of the word.
You really do need to catch up on history a bit. The Acoustat X design, released in 1976 also ran high voltage tube amps directly to the plates of electrostatic panels at slightly over 3kV. Later, they replaced the tube amps with bi-formers increasing the drive voltage to around 5 kV. The current Sound Labs electrostats run the bias higher still. I seem to have lost your point with your dissertation about a product for which I have used for more than a quarter century.

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