In article , Iain M Churches
wrote:
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.

If someone can supply me with some figs (from say the legendary Krell:-)
I cold use these a benchmark for the measurements of my own amp.

FWIW and IIRC: The response of the 730 amps I designed/use has -0.2dB
points at 20Hz and 20kHz [1] and it is effectively a first order rolloff
that is producing these results. (i.e. with the -3dB points well away from
20Hz and 20kHz). Can't recall the phase, but you can work it out from the
above. Can't say that this is a 'high end' amp, though, as I keep it on the
floor. ;-

Does this matter? Unless you are using something like ESL's in an excellent
room, I'd expect the phase effects of the speakers and room to dwarf any
amp phase effects in most cases.

Slainte,

Jim

[1] Assuming 8 Ohm resistive loads. Changes a bit at HF for some other
loads.

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