Hi Graham and all,
A great thread which went off in all directions!!!
I get a few of the newer B&O in for service, and I see a lot of the passive components sourced from China or Korea. It's the passive components which determine long-term reliability of any electronic product, so all I can conclude from this, is that at B&O today, long-term reliability is not a priority.
Peter, you mentioned the ghastly red capacitors of the 1970's. Well, I look at it differently. In the 1970's, there was not the enormous choice of passive component manufacturers that there are today, and B&O had a limited choice.
The fact is, that they chose very good quality components (ROE or Philips), at the time. That the components did not last, is not really B&O's fault. In fact, it is testament to B&O's (then) philosophy of overengineering, that the BeoMasters survived (in spite of failing passives), and now with a complete capacitor change, and realignment, they can be brought back to life, to a standard even higher than then.
Today, B&O has a massive choice of suppliers of passives - Chinese/Korean garbage, or European/Japanese quality (even if actually produced in the Far East). They choose low-end quality. That disturbs me. They could very easily continue to source Vishay components (Vishay bought out most of the manufacturers which B&O used in the old days), and the increased cost on the BoM (bill of Materials) for each BeoSound, or BeoVision, would not be more than a few Euro's.
If you open up an Arcam unit, you will find only the highest-quality carefully selected Japanese/European passive components.
That to me, signals a totally divergent approach to quality-control, as compared to B&O.
When I restore vintage B&O, which I love doing, I get a tremendous amount of pleasure doing it. Part of that pleasure is in the freedom of choice I exercise in selecting the different types of passive components, according to their function in the unit, to bring out the most pleasurable sound for my customers.
From what I see on the PCB's, it's apparent that Arcam design engineers have that same freedom of choice, but their B&O compatriots definitely are restricted.
SHHHHHH - And keep this under your hats - the Arcam distributor in Tallinn - Estonia sells for about 20% under the UK price. Full factory worldwide warranty, but you have to go there to pick it up - seems like a nice excuse for a weekend trip!
And McIntosh, well, you other chaps have had your say !!!! Too many words spoil a good thread!!!!
And, yes, on my own stunning BM3400, the LOUDNESS button is permanently engaged (but I modified the circuit highly, so the sound is just so pleasurable).
IMHO, the most desireable BeoMasters are the BM4000, and BM4400's. I don't own one, but I have restored a couple for customers, and there is very little (at any price) which can deliver their powerful, clear, musical sound. Again, testament to B&O's long-dead built-in lifetime quality.
Long live vintage B&O!
Menahem
Learn from the mistakes of others - you'll not live long enough to make them all yourself!