You have an answer to your PM regarding the dustcover parts. The Beogram 1800: Is that the old one with wooden cabinet and SP cartridge or the newer one with plastic frame and MMC1-5 cartridge ? Martin

25000 Hz from a full range driver ? What type is it ? That is a bit higher than the Beovox 1200 tweeter will go. Martin

Sad case of shipping damage but I'm sure, you will get it going all fine again. NEVER ship a Beogram (or Beocenter) with the platter fitted. ALWAYS wrap the platter separately and place it under the Beogram. Martin

Why full range drivers ? What are you trying to achieve ? Martin

There can be many reasons. Oxidated contacts and sliders, balance not correctly set ... Is it on all sources (Tape/FM etc.) ? Martin

[quote user="chartz"] I feel a little abandoned right now... (sigh) [/quote] Well, if only I had a spare processor. It looks as if that's what you need. Martin

Mark, What Jon wrote is all true, he has a lot of knowledge and it's wonderfully put but it doesn't say anything about the crossover frequencies and it doesn't talk about your problem area. Besides, I never considered this series of speakers as being truely "Uniphase" and none of the drivers have reversed polarities in the S120

The crossover frequencies is found in the service manual but, as said before, they can also be calculated from the circuit diagram and measured in a test setup to confirm correct operation. Martin

The filter boards are where the electronic frequency filtering takes place. In your speakers, it's a printed circuit board with all the components needed to separate low, medium and high frequencies and send them to their respective drivers. With the circuit drawing in front of them and a bit of calculating, the tech guys should be able to tell

Thanks Søren, very kind of you. Rich already stepped in and we're in business. Martin