DualTriode
Addicted to Fun and Learning
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I agree about certain tube gear with intentional distortion levels (in the percent range) and undesirable high and frequency dependent output resistance that interacts with the impedance of a speaker. You could call that deliberate 'voicing' and there are people that prefer that 'sauce' pored over everything.
But op-amps that only will differ slightly in distortion in inaudible amounts above 1kHz, is not 'voicing' at all but a marketing strategy and makes use of how the human brain 'works'.
So this my take on all this Op-Amp rolling stuff:
Yes much of it is psychological, first comes Denial then Anger ......
Real measurements are important. Speaking of Op-Amps the only place I found numbers that stood out to me was rt Hz kind of sound floor measurements for high gain noise measurements of riaa Pre-Amps.
The OP the brought up voicing in general.
Personally, on my bench I have built more than several vacuum tube and jFet line level (pre-amp) circuits designed for voicing. See the plot below in the pdf. I still have that AP 2522 analyzer in the cage.
Note that this is not a power amplifier with variable output impedance that will interact with the speaker impedance.
Thanks DT
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