The person that suggested you must have faith is on the side of not hearing a difference. Read a few of his threads on cables and that will be verified. I agree with Grannyring, listen for yourself. That is the only way. Assuming that we know how to measure everything that the human hearing mechanism can distinguish is incredibly arrogant. Fortunately, at one time, someone proved that the world is not flat. All of the scientists and people who knew beyond any doubt otherwise, thought him a fool for holding such beliefs without ever investigating themselves. Again, listen for yourself. It can be done with little to no investment other than time and an open mind.