[2bigears]

  HI EVERYBODY ,,  i'm selling my old RM-9 MK1 amp and a guy tells me
      it will need caps replaced soon ,, is this a general rule for an older tube amp ??
          caps are cheap ,, right ??      it has a full compliment of NEW tubes right fron Rogers shop.
               is 1500.00 an ok price ????  i really don't need this amp. right sizing and moving..
       regards ,,    Pascal

[2bigears]

   i should call Roger i guess.     wish i knew more about amp building maintenance and longevity  ....

[gguillot]

It's generally a good idea to replace at least the electrolytic capacitors in the power supply. Those can fail due to age and take out other components with them.

[richidoo]

Quality caps should last at least 20 years, but they can sometimes last much longer. Junk caps can last as short as 5 years. Of course Music Reference uses high quality caps. Good caps with high voltage rating for tube amps can be kind of expensive, and they do make a difference in SQ, so definitely refer to Roger's advice on when they should be replaced and with what parts.