when you set up a blind test make sure that every player will be heard at exactly the same sound level.
some expensive players have up to 4 volt
putput and will sound louder (= more impressive) then a player with the normal 2 volt
output.
some pink noise , a DB meter and someone who writes down the settings on the volume knob will do the trick.
player 1 is 98 db with volume at (try to be precise here) 11óclock
player 2 is 98 DB with the volume on 10óclock
or make some little mark on the amp with a small sticker.
if all the music is played equally loud the test is more reliable.
and ask yourself this question.
"whats in a cd player that actually makes a sound" in stead of just passing a signal.
have fun on your test please PM me with the results.
i might miss them.