Blind fold hearing test

How many of you could be blind folded or put in a room in total darkness and know what kind of speaker amp and preamp are being used. Another words if u came blind folded in my listening room could u tell I was using a Krell amp a ARC pre and B&W speakers? Not necessarily the models but more or less the brands. I would be the first to say for me it would be no. Would love to see how many of you could. Should be interesting.