"Annika1980" wrote in message
oups.com...

j. wrote:
So lets say that no one is able to reliably tell the difference between
speaker cable A and speaker cable B in a DBT. Lets also say that no
one is able to tell the difference between amp A and amp B in a DBT.

...but what if enough of these things added together does produce a
perceptible difference?

How can it? If A=B and C=D then (A+C) = (B+D) = (A+D) = (B+C)

There are no degrees of "No Difference."

I don't think you believe that. There are rounding errors. A human cannot
detect a volume difference of .001 dB. That should be obvious. Increment
it 10,000 times, and just as obviously, humans can detect it. That was an
extreme example.