Actually for me the better way to determine rather than test equipment is to swap or not swap fuses and see if people can tell the difference. If test equipment doesn't show a change people will say it's not sensitive enough, etc. I would agree. Of course people will say they need time (hours or days), which may be valid unless they just said they heard a difference.
I was at a dealer's open house a while ago. He played some music and everyone liked it, oooh and aaaah. Then he showed us a CD mat that he put on top of the CD he just played. Much better...to everyone except me. I wasn't familiar with the system or the track he was playing, and I suspect others weren't either. I would have LOVED to do a blind test then. I would have been very impressed if others could tell the difference. Either way I would have learned a lot about my hearing, tweak's effectiveness, how people act in that environment, etc.
I was at a dealer's open house a while ago. He played some music and everyone liked it, oooh and aaaah. Then he showed us a CD mat that he put on top of the CD he just played. Much better...to everyone except me. I wasn't familiar with the system or the track he was playing, and I suspect others weren't either. I would have LOVED to do a blind test then. I would have been very impressed if others could tell the difference. Either way I would have learned a lot about my hearing, tweak's effectiveness, how people act in that environment, etc.