Years ago I read an article whose author stated that as a rule of thumb, capacitors on solid state power amplifiers should be replaced every decade or so. This is even more pertinent when the amplifiers receive a lot of use. 👍
Amp showing its age?
Before getting into details, just the bottom line: can an SS amp, well into its second decade, begin raising its output impedance and/or dropping its peak current capability? Because mine certainly seemed to be doing one or both, so I have just replaced it, and now the speakers are again obedient.