Arny Krueger wrote:

What you may find some day is a solid state optical disc player
with a few thermionic noise and distortion enhancers slapped on, right
before the output terminals. Why would someone who is interested in pure
natural sound want such a thing?




Some people dislike the sound of op-amps. Some op-amps try to correct
serious defects
in their design with lots of negative feedback. The class B output
stages in many op-amps
can have traces of crossover distortion products even after NFB. Some
op-amps can
be made to act as if they are "single ended" if you connect a resistor
from the output to
either a negative or a positive supply of DC of around 20V. The
resistor should draw
current thruout the entire audio waveform.