Replacing Capacitors, I Don’t Wanna!

That's real BS.  

Usually, the electrolytic capacitor in audio amplifiers would last many years. The new ones are very reliable.

I used the LCR meter to check the ESR, dissipation factor, and capacitance to confirm the condition of the Capacitors. Without testing them with instrument, I won't replace them without any reason.

Replacing the capacitors with different type/kind, it maybe cause distortion/problems.

If it ain't break, don't fix it.

Johnny

@larryi @kmtang ;  Everything is working as it should, obviously no need to concern myself with replacing capacitors at this stage. To be fair, I think my speaker tech has the tendency to overthink things. So what you’ve both shared is pragmatic and sound advice. 

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.