What is the best sound system you ever heard?


I am curious to hear what in your opinion was the best system you ever heard..

Thx
ishkabibil
In the old days ....a Decca cartridge (don't remember the arm or t/t), Audio Research electronics, and Infinity IRS speakers.
Here is a system I heard at a friend's house in 1978: Thorens TD125/Rabco SL8/Panasonic Strain Gauge cartridge, Marantz 7 preamp (used as a line stage), pair of Futterman H3AA OTL amps and a pair of Quad 57's. After hearing this I resolved to get a similar system!
The Infinity IRS V speakers with $100,000 of associated PS Audio gear at PS Audio is a strong candidate for the best system I’ve ever heard.