Is this question serious ? 1st off Agon isn't going to allow any peer reviewed white papers to be posted that disprove 90% of audiophile snake oil , secondly who cares if people can't hear the difference between a $20,000 Audio Research amp and a $300 Behringer pro amp ,I wish I was in the camp who doesn't hear differences in components ,I'd sell off my entire collection ,replace it with a $500 Bose plastic mess and put an extra $100k back in my bank account , I've been gone for 8 years and still the questions are the same lol
How are you hearing no difference?
In my experience, I've never heard two pre-amps that sound exactly the same, nor two DACs that sound the same, nor two amps...etc. Yet, occasionally someone will claim that they heard no difference between Product A and Product B in their system. I find it difficult to believe.