Class A amplifiers

Last week, I shipped my Krell Evo 402e for a factory refurbishment. It is played six to eight hours daily for 10 years and well ventilated. I plan to keep it forever and feel it a good investment to refresh the unit. 

I have Plinius SA 102 in dual mono at 125 watt pure class A stereo and 740 watts mono.
Bought new in 2004. Still running great!
Also Plinius SA 100 mk3 runs fine.
Also a Cary 300b sei 8 watts pure class A tube amp running great. And ...
A Dared VP 845 18 watt pure class A running great.
All amplifiers need proper care and ventilation.
Follow those simple requirements and they will last forever.
What is needed is a little care and common sense. Know what speakers perform best woth a given amplifier.

I have a Spectral DMA 200 that sounds wonderful driving a pair of Magnepan 1.6's. I have tinnitus so I can't hear the cooling fan. And yes, it helps keep the room warm in winter. Not bad for a 34 year old amplifier!

doesn’t spectral only work with spectral pre amps and cables? Isn’t spectral a closed end system or no

Who remembers the Threshold T200? Pure Class A. It was produced about ‘92. Jon Soderberg services all Threshold gear. And the Plinius SA MkIII was for my money the best Class A and Class AB money came buy. It was produced about 1999.