@ghdprentice Sorry for the lack of clarity. If the failure issue so seldom arises why is the possibility weighed so heavily in the selection process?
Longevity (our gear not us)
One of the criteria I see debated here is a chance of repair issues, mostly with used/older equipment. I was curious today about when my Proceed HPA-2 left Class A country. Most of the posts I read were from the early 2000's.
A few addressed reliability as even then the amp was getting old. I have owned mine for 7 years and it is a perfect match for my DCM Time Frame 2000s. Relatively efficient at 92 dB and very power capable.
The amp is massively built in a dual monoaural design with 12 150 watt transistors per channel. I listen daily at moderate to loud levels and weekly LOUD. Even then I rarely even start to tax the amp.
Considering the quality of most gear discussed on here I think the issue is low level. That being said having your amp go bye bye is heartbreaking ;)