"try to listen on the most efficient set of speakers possible- you will hear more of the differences..."
This is not always true. One can argue that high efficient speakers has lower requirement. Therefore, you can't hear as bigger difference because it doesn't draw as much current/voltage through the cable. I found the less efficient setups can hear the same amount of differences too. It really depends on your overall setup.
Consistency is the key to test the sonic signature. It doesn't matter how many setups you test, you should always get identical results.
I've always compared any cable over 5 totally different setups and found the result always identical.
This is not always true. One can argue that high efficient speakers has lower requirement. Therefore, you can't hear as bigger difference because it doesn't draw as much current/voltage through the cable. I found the less efficient setups can hear the same amount of differences too. It really depends on your overall setup.
Consistency is the key to test the sonic signature. It doesn't matter how many setups you test, you should always get identical results.
I've always compared any cable over 5 totally different setups and found the result always identical.