What stereo equipment do respected musicians listen to?

In 30 years of providing sample cassettes for many well-respected artists, the most common complaint was "There's something wrong with your recording. The entire concert is sharp/flat." The problem was, of course, their not very good cassette machine running either fast or slow.

Bob Weir McIntosh, Neil Young McIntosh and Tannoy…..just from what I know

Neil Young: I have a lot of McIntosh equipment that I use for listening. My studio is full of different stuff, Tannoy and an old pair of Altec [Lansing] speakers with Mac 275s running them. It’s the old Voice of the Theater speakers. They’re ridiculous [laughs]. Also some reel-to-reel gear.

My ATC's don't sound "bad". Unless "bad" really means, "extremely dynamic, supremely accurate, and riotously fun"!

Jimi Paige has been photographed using a Luxman preamp with McIntosh amp.

McCartney has two Garrard turntables in his listening room per photos. 

Marvin Gaye was photographed with Mac amp, Thorens turntable, and a Teac reel-to-reel. 

Magic Johnson was a DJ at Michigan State.  When he made money in the NBA he had a pretty sweet system, but I don't recall what the gear was at this time.