What stereo equipment do respected musicians listen to?

I not long ago saw a vintage photo of Louis Armstrong in his home studio listening to what appeared to be a pair of Tandberg 64X tape decks, a Marantz 7C preamp and 10B tuner.  The power amp(s) were obscured, but it's a safe bet it/they were Marantz as well.

Having found a virtual tour of the Louis Armstrong house, I was able to get a better look at his equipment.  The preamp appears to be a Marantz 7T and the tuner is probably whatever was offered at the time as a mate to the preamp.  One of Tandbergs was a player only.  He died in 1971, so solid state equipment of any quality was only around for a few years.  He appeared to have a automatic changer to play LP's, what kind is a mystery to me.