Longevity of ownership

I have a pair of IMF transmission line full range speakers.  Monitor MKIII’s III’s

and TLS-50’s.   All from 1974.  Purchased new.

In 1979 I bought a pair of Dahlquist DQ-10 speakers and a Carver amplifier and preamp. The DQ-10’s are and have been my only speakers to this day.
Still have the Carver gear too but it’s “in reserve” now.
Macintosh amp/preamp now delivering to the DQ-10’s. Still sound awesome.

I replaced all my gear about six years ago. But before that I owned and used an Audio Research preamp for twenty years, a Threshold S500 (Pass) amp for fifteen, A Pass x350 amp for fifteen years. At least one or two Audio Research phono stages for over ten years each. Non of this equipment ever required service. 

I have a Sanyo turntable I bought in 1979. Needs a new belt. At least.

First time I heard the Atma-sphere m60 I was hooked. A few years later I sold it and bought the MA-1's. Also have the MP-1. They're both upgraded to MK3.3 status. In total I think I'm approaching 15 years.

I've also been a ZYX cartridge customer for about the same length of time.