Andy Evans wrote:
I could tell you how to easily do a representative set of measurements(AK)

But evidently you can't explain an obviously audible phenomenon.

Can I ask you a question?

Do you believe that if on two successive runs, if a CD transport
recovers the same bit pattern, the resultant sound will be the same?

If so then your simple test would be to compare the bitpatterns on two
runs, one silent output, the other cranked to the max, and if they are
the same, you must agree there is no effect to observe.

If they differ, you have a defective CD transport.