Great question….They might not care about sound quality but I have to imagine that some of them do. It can’t be easy to energize huge spaces with linear sound. I haven’t been to many concerts but the few I have been to have been pretty good. Smaller venues are always better overall from my experience.

M60ti Hafler9505 & JFET Pre,Axiom Transformer. M3 Marantz PM7200 Dual 606 Denon 2700 M2 Yammy RX595