[MrFixr55]

I'd be a little more worried about some of those solder joints, especially those with so much flux.

I'm supposing that all those caps from "Audio Classics" are new. regarding the age of the "can", I don't know if carbon comp resistors are still sold; they are not found in new electronics, and I assume that the metal film jobs are superior. I also don't know if the caps on phenolic boards were a McIntosh design or are replacements for the older style "cans". Ther does seem to be one older cap on the terminal board above all those coupling caps.

I always hope that these newer electrolytics are designed to last much longer than the caps of yore, as my 2 largest audio mixer "boards" contain a ton of electrolytics as coupling caps and they are 25 years old. I did deal with instruments whose switching power supply caps (some of them high capacity "brute force" caps across rectifiers directly supplied by utility power), that lasted the full 25 years that we supported the instrument for. I suppose that one can either just replace all electrolytics. or check the power supplies for ripple.