Eureka! I appear to have found the culprit: It's a transistor. Swapped the yellow and green wire, this made the problem change sides (from left to right speaker) So, the problem had to be with something on the board with the potentiometers (this board contains the preamplifier, I guess?) Changed the elco's on this board, did nothing... Swapped

Hey Richard! Thanks for your reply! By capacitor, do you mean the electrolytic ones or the capacitors in general? :) Chieljan

Hey Beoworld! First, I'll introduce myself: I'm Chieljan, 22 years old and I live in the Netherlands. I just entered the wonderful world of vintage Bang & Olufsen audio by buying a beomaster 1200+ matching beovox 1200 speakers. I'm totally in love with it, it is a wonderful machine! Problem is, it went broken a week ago. Volume on the

Hey Andy, That's a funny coincidence, just signed up to ask a question on my beomaster 1200. Have the matching beovox 1200 speakers too, they're great! Was a good buy, congratulations! ;) Chieljan (Netherlands)