Krell

Hi everybody,
about a year ago I bought a FPB-XXX cx by Krell as second hand unit from ufficial distributer.
It sound great and drives my speakers the way I was expecting from a Krell.
But.... had a surprise! one day opening the top cover I noticed that the left Assembly of my FPB-XXX cx were used the usual blue 8 capacitors, while in the right assembly al capacitor were black (different brand)!
Had an answer from Krell it says......"are
original and factory installed. Assembly of this FPB-XXX cx was during a
transition period where we were phasing out of blue capacitors and
incorporating black capacitors which have the same value and specifications"......I'm sorry this is unbelievable!
Any opinion?
Thanks
A disappointed!