Raul,
Sure, SUTs distort. But, correctly implemented, an SUT does not introduce hiss or any such noise not correlated with the signal. Sure, "noise" can be introduced from imperfect shielding, but the act of converting current to voltage in the SUT itself (i.e., the "amplification" is noise free). That cannot be said of any form of active amplification (look it up in EE journals).
Solid state devices are low enough in terms of noise production that active amplification with solid state devices can also be, for all practical purposes, noise free. SUTs are used in tube phonostages because, in part, it is much harder to get noise-free high gain amplification using tubes.
Whether someone likes the sound of tubes or solid state or SUT or active amplification is a personal matter. There are plenty of designers (and purchasers) who will take the trade-off of SUT distortion and tube noise and distortion over the sound of solid state.
Yes, Raul, many of us are idiots. But, not everyone who disagrees with you -- on the superiority of solid state, on the superiority of moving magnet over moving coils, on the superiority of your own product over anything man or god has ever conceived -- is necessarily an idiot.
