I rotate 3 power amps, and one of them is a McIntosh 2105 that I've had for many years. It needed work a few years ago, in fact, it was time to replace transistors (!). I took that opportunity to have the technician put in new input jacks, as well as an IEC input so that I could use a modern power cord, and finally, modern speaker terminals instead of those awful terminal strips that McIntosh used for years.
As a result, I am very happy with the amp; more than I was before, and it is more convenient as well. I know that the resale value is shot, and I don't care at all because I'll never sell it.

