In article , Glenn Richards wrote:
"I then switched the power cable on the amplifier to use the Isotek
cable. Immediately there was an improvement in dynamics, percussion in
particular had much more presence and depth".

Which would make perfect sense, as by taking out RF interference what
you've done is lowered the noise floor. You may not be able to hear RF,
but if your amplifier is trying to reproduce it then it's increased the
noise floor, which will result in the dynamic range of the system being
reduced.

And the increase in "presence and depth" on percussion was the only thing
that was noticed?

Don't you think that if the noise floor was the only thing that the RF
interference caused (which seems a trifle unlikely if it really was RF
interference), it would simply be audible as noise? Why the need to listen
to music subjectively and write about it in flowery language? Why not just
measure the noise?

Rod.