I agree with Chadnliz. When a musician listens to music they are more concerned with phrasing, time signature, texture, message, emotional rhythm and progression, feeling. Are they moved/inspired etc. I am sure we would be surprised with simplicity of their set-ups. I envision a vintage set-up ala Sansui, Pioneer and Advents or Cerwin Vega, connected with zip wire. Like many of us they listen to the music not their equipment.
I am equally sure their are some poseurs out their who have to put on a show for people who may stop by or do an interview. They are generally the artists who are driven by other things than being a "true musician".