Originally Posted by SilverEars
I know electrostats use tubes for high voltage.
Oh yeah there is some contradicting statements here regarding tubes and distortion:
1. Amp distortion is not audible below a percentage .1%? which is popular statement here
2. tube have higher distortion than SS amps to probably imply that it's audible?
Not sure if you mean electrostats create the high bias voltage using tubes or not. I don't know if any of them use tubes for that. Most do not. Most use a variation of stacked voltage doublers to create the high voltage on the panel. In more recent years some use a simple off the shelf high voltage supply.
As for distortion, at some point distortion becomes inaudible. Above that point it is audible. There are tube amps with very low levels of distortion. Most are somewhat higher and perhaps audible in distortion levels.
Probably the more audible part of tube amps is their high output impedance as they typically are designed. It can audibly effect the speaker frequency response due to the uneven impedance of most speakers. It also will reduce the damping of woofers in some cases.