It's a general rule for all pressure-chamber speakers not to run at high volume unless under "normal operating conditions" (cabinet closed tight). It wouldn't sound right either. You will also notice foam strips along the chassis edges to keep it all tight. I agree, the photos are very good. The first version of what later became the

Maybe, is it a rubber or foam surround version ? Martin

Doesn't look too bad. If you losen the four hex nuts, I'm sure the front cloth can be taken off. Martin

Probably the speaker surround. If it's the same as the B&O version, it's a paper surround, not foam. The paper dries out, becomes brittle and starts to crack. If no parts of the surround are missing, you can brush it over with contact glue of a type that doesn't get stone hard. Some types will dry to a strong, flexible coating, almost

Der er kun to kanaler. Venstre og Højre, men der kan være 4 tilslutninger (2x venstre og 2x højre). Måske det kun er de to venstre eller de to højre, der virker ? Det ville være tilfældet, hvis en forstærker kanal er defekt. Hvis et venstre/højre par er defekte, ligger fejlen et andet sted. Jeg

Interesting set. I never saw or heard of this one before. Basically, there are two different stereo decoders used in the Beomaster 900 and 1000 models but they are not unique to either Beomaster. One type will work only in some Beomasters, the other will work in (almost) every type. Get one from a scrapped Beomaster 900, it will most likely be suitable

I never liked cleaning tapes and always preferred cotton buds. The cleaning tapes may be good as a fast solution, especially in hard-to-reach decks (car stereos etc.), and some are of better quality than others. Maxell sounds like quality to me. There are some wet-cleaning tapes too, where you put a couple of drops inside the cleaning tape cassette

I take it that it's tapehead cleaner you are asking about (the cassette is the housing for the tape). In short, there are really no bad products, at least none I've seen or heard about. I use clean IPA (IsoPropanolAlcohol) that can be bought under many names, such as f.e. carburettor alcohol which seems to be the cheapest. Cotton buds are good

A scope would be superb, but sometimes a multimeter is better. It all depends on the actual circuit and signal. I'm afraid I can't guide you through an exact diagnose of this circuit, it's quite complex as you can see in the schematics. But check for cracked solder joints under a microscope. The nature of this item, being a remote control

The transistor housings have a ridge where their two cast plastic parts are joined, this is normal. Nothing visually wrong in the photos, I think. You will have to measure around a bit. That standby circuit is wonderful for a headache and probably where to start. Martin