Replacing Capacitors, I Don’t Wanna!

I looked at a picture under the hood and I see those blue caps are the Vishay BC 135 series capacitors. Their lifespan is 250,000 hours at a 40C ambient. That's over 28 years if you do the maths. If the temperature inside the case is lower, say 30C, then the lifespan is 630,000 hours. So hopefully by then your great-great-grandchildren will be handy with a soldering iron.

@gs5556 Thanks, that's good for my mental health!

My 40- year old Sumo Andromeda amp has been in daily use now for several years. Perfectly quiet - no problems. If your ASR amp is the same I wouldn't worry. The only caps that might become problematic would be the power supply caps. There are typically two or four in most amps.

The replacement or upgrade to better capacitors will improve the sound so just don't replace, upgrade them and a few resistors to Mills or Audio Note non-magnetic.

Happy Listening

The problem with replacing parts with “better” parts is determining what IS a better part.  It is not always the case that more expensive parts with a popular buzz is the right choice.  If a part change can change the sound it can do so for better or worse.  I’ve heard tube amps whose sound dramatically changed in bad ways by swapping capacitors, in one case, very expensive Blackgates for cheap caps, making the amp sound broken.