"Arny Krueger" wrote in message
. ..
"Sander deWaal" wrote in message

"Robert Morein" said:


Both amplifiers had distinct signatures that were plain
as day, and distinguishable independent of volume level.
This was apparent to both of us.
I wonder what an ABXer would say, if he were present,
sans test gear.

Would he deny the experience? Would he put his head in
the sand?


It would be interesting to find out why the 2 amps
sounded different.

Been there, done that.

Something in the Fr, the distortion,
the output impedance, or something else entirely?

Something that can be measured, but not necessarily one of the conventional
metrics.

Output impedance variations with frequency always lead to frequency
response variations.

I thought your position is that damping factor is a negligible factor in
most amplifiers, particularly modern solid state ones. Please explain.

Frequency response variations change the spectral balance of the music.
True.

Nonlinear distortion also changes the spectral balance of the music.
True.
Never once saw two amps that sounded different that didn't also measure
vastly different, if I was able to get some measurements made.

It seems as if you want to join the camp entitled "many amplifiers sound
different, even if they are, nominally, properly operating."
I don't have a problem with that.