Frank Stearns wrote:
"Kevin Aylward" writes:

If the thd/imd is below say, 0.01%, and say power BW of 50Khz, and
the amp is competently designed, i.e. no spurious dynamic biasing
issues, stable etc, then they all sound the same. Period.

Kevin -

Thank you for your observations, but please -- could you describe
your
room where you're making these peceptual observations -- LEDE? RFZ?
Hybrid? Other? Any acoustical treatment at all?

Let's make it easy and do our listening tests with some really-pretty
good headphones - say HD 580s.