"Iain M Churches" wrote in message


I would be interested to know the phase response
of a high end SS amp (OK, I know, they are ALL high end:-)
at 20Hz and say 20kHz, or more points if the info is
available.

Look at the amp's frequency response curve and use what you know about the
Hibert transform or simply draw Bode diagrams to estimate the amp's phase
response. At low levels power amps tend to be minimum-phase.

Amps tend to have fairly well-matched response between the channels, so the
phase response isn't all that significant, anyhow. Phase response matching
between the channels is far more important.