How are you hearing no difference?

I've never understood why people who claim everything sounds the same are even in to the audio hobby, and especially why they spend so much effort across the various audio forums trying to convince people they aren't hearing what they are hearing.

OK right, then you must plug your ears and conduct a 'silent test' when you compare the taste of two different hamburgers. Because of the 'psychodegustations'.

So you're saying that 'good' hearing is quantifiable among those who have it? 

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 

I think the questions are the same for a reason.............

I think this discussion is purely academic. By far, majority of people can tell the difference between a good sounding system and a great sounding one. It’s the so-called audiophiles that look for small incremental improvements which may or may not be apparent to an average person.