So I know I've been kind of all over the place here, but I'm really enjoying the Bang & Olufsen lifestyle and vintage products. So I took a plunge and bought a pair of Beolab Penta 1 speakers (6603). I knew they would have some of the usual issues. Rotted surrounds on the mids, and an amp supposedly has an issue as well.
My goal with this thread will be to document the repairs as best as I can, and also to ask questions of others who have done similar restorations. This pair of Penta's are far from perfect, so it will be a bit of a process for me, and I don't expect it to go too quickly.
A little background information first. I bought these from the original owner. He stated right away that one of the amps had an issue for sure, and he wasn't sure about the other since he was using them with a different amplifier all together. He also stated that he didn't know how to remove the grills, so he was unable to check the rot condition of the mid range drivers.
After unpacking everything, I checked to see what I all had. Speaker towers, check. Beolab 150 amps, check. Speaker stands, check. Hardware to secure them all together... Nope, dang. Oh well, that's pretty easy to find, but it would be nice to confirm the size of bolts that I need. I think according to the service manual, it's a 3.5 x 50mm (page 4-4).
So, after a few emails to Peter, talking about the speakers. I then sent an email to Martin asking about his amp and crossover refresh kit. He asked for a few pictures of the crossovers since there can be a few different styles. So I dug into the speakers, and found a mess! The crossovers have been worked on previously for sure since one board in each tower had tape over the sides, and some weren't even in the proper grooves inside the tower.
I also found coils that have fallen off the board. On one of the boards, the magnets that go around two of the coils were shattered and the pieces were laying inside the towers. This could have been due to shipping, but I'm now going to have to figure out what to do with them.
Notice the broken magnets around the coils here:
So my questions are as follows:
1) Do I need to replace the coils that have come loose? Or do I just re glue them to the board?
2) Are there replacement coils for the ones with the broken magnets?
3) Should I go with the foam surrounds? Or the rubber ones?
4) Any ideas on how to un crush the dust caps on the woofers?
Location: Minnesota, USA
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