Hi All, I'm new to this forum.

Question about older solid state amplifiers:
I have a unit that has lots of brawn, but it's about 20 years old.
To give you a feel, it has:
225W into 8 ohms,
360W into 4 ohms,
720W bridged into 8 ohms.

I was told that the older amps tend to get "soft" after years of use.
Mostly the little capacitors in the output stage (NOT the power supply),
and the output transistors switch a little slower after time.
Result is that the amp looses a little "punch" and detail.

I've seen tube amps revived with a replacement set, and I know sometimes an output transistor will burnout like a light, but not sure what to think about the amp going "soft". I can understand it drifting a little, but because it is solid state it shouldn't drift very much.

Anyone have any knowledge about this?
I guess a good test is to ship it to the factory and have them measure it against the specs.

Thanks in advance.