The problem is, if you aren't listening to the amps in the exact same system, changing only the amps and absolutely nothing else, we are all speculating.
Because in separate systems, as you know, you are listening to everything else also. Cables, source, room, power coming in, speakers, etc. It doesn't matter that you are listening to the same recording. you are also listening to everything else.
I know, what can you do? But, I just want to be clear. Luxman, Gryphon, Audio Research better? How could you possibly know?
but, take that amp in a system, play your favorite music, set the level. replace the amp with Gryphon, adjust the level to match, then play the same music. Making sure the levels are matched. Do you hear differences? probably, but better? maybe different. That is the fun part.
Problem is many dealers don't carry what you want and if they do, would they let you take it home to try in your system versus your own amp? They should. for high end, very expensive equipment like this, they definitely should.
Audio shows are a good way (when they restart), but you are still listening in different rooms with different equipment. Not an apples to apples comparison.
enjoy
