What stereo equipment do respected musicians listen to?

I set up decent systems for the the Airmen of Note bari player Don New and for a  reed player friend who played all of the major hotel/casinos in the 60s.  They both had dismal setups.  That’s my foray into that world.  I’m sure it varies.

I simply love ‘confirmation bias’ in full swing.  The confusion and obfuscation created is wonderfully entertaining if not troubling.  

My ATC 40As also sound great. In fact phenomenal. The question simple enough is how many commenting about the ATC speakers actually own them? That's all. Thanks