"Someone told me on another site that if I move the amps beside the speakers and not in front of them , my system will improve immensely."
Oh brother... to much audio internet info.
Not saying a tube can become microphonic, but that looks like perfect example of A.N.
I’d stay away from audio forums and just enjoy your excellent gear.
Edit-It's a free exercise to move them, so try it. Everything in audiophoolery is YMMV.