amplifier longevity

I think if it has pcbs that can be an issue to ultimate longevity.  Point to point wired amps will probably live forever as repairs are always much easier.

good answers… 1961 and going strong with a refresh and some modifications….

i wouldn’t worry about generalities but instead focus on a particular model that trusted audiophiles or service people have seen for years….when doing buying homework…..

What I have found as a general rule is that if you can afford it, it pays to buy quality. One characteristic of equipment that sells for premium prices is that it will have quality parts. Or rather, bargain products need to compromise on the quality of the parts. And when you really get into the high end, your dealing with equipment that's made by hand. 

I agree with quality setting you up for service time. I have a Cary Rocket 88 heating my man cave in Winter, and I’ll go to my Marantz 2226B in the warmer months. So far, my Klipsch Forte efficiency likes em both. Ears are happy!

ARC D400MKII going on 29yrs and still kickin azz!