I am the happy and content original owner of a Krell FPB 300cx since 2002. Never had a hiccup, blip or any other issue in all this time. About 6 years ago (amp at 15 years old) I hauled it up to Krell in Orange, CT to have the amp re-capped for about $1,000. The tech was as nice and cooperative as could be, took about a month, and when I reinstalled it, it sounder noticeably better than pre-capped. I have reconsidered a replacement amp several times but have not been convinced. I just leave the amp on all the time and works musically when I play music.
This is why you see rare old FPB Krell mega amps for sale. What could replace them? Neal