George Meyer told me to do NOTHING to the amp unless it breaks.I wouldn't either, but the way you were talking sounded like you were going to. If you do then do as I said with the cap banks.
The 23.5 also killed a MACINTOSH mc402 . The sound of the 23.5 was far more open and detailed.
Of course it did, just about anything does. But the MC275 is a different story.
Cheers George