Hi,
I'm in lisbon- PORTUGAL
I have an ML335 for 20 years
excellent power the ML335, you won't find better for a low price
never done any overhauls or repairs
will carry out a revision in 2023 just because of age, change 4 capacitors 51000-160V and another 4 capacitors 1900-250V
and more 8- 68uf-60VDC
plus 20 resistors and two Ships LT1097CN8PBF
all this indicated by the manufacturer/dealer Harman Kardon
I think I helped
.