Expert Pro sound quality

[GuillaumeB]

Timbre can be (actually is) added/changed by an amplifier having a sufficient level of euphonic distortion
A 3D effect can be added by increasing the background noise (at levels not directly audible) particularly if the noise is signal correlated.

I know this from experiments carried out a long time ago to research why LPs sounded so nice despite the technical weaknesses of the mastering, manufacturing and replay processes.

Many amplifiers, particularly those using transformers and/or low feedback add audible amounts of extra overtones which may make an instrument sound more pleasant to some even if not true to the microphone pickup.

Yet many are saying timbre and soundstage is much improved with the new PRO series. In fact when I got my O d'A (not quite a PRO but almost!) it struck me quite how much more real instruments sounded so presumably there are other forces at play here (assuming that it isn't all placebo effect, in which case even Devialet are duping us now!).

Guillaume