This is the second part of the Bang & Olufsen Beolab Penta restoration. For the first part, see:
For the first big task, I stared by removing all the dry-rotted foam from the midrange speaker drivers. This is a tedious process since the speaker cones are paper and can’t be damaged during the removal and cleaning process.
Quick picture of the wiring so I remember how to hook everything up:
The sad condition of the original foam:
Initial foam removal:
Showing the residue that needs cleaning:
Very clean drivers:
Another picture of the clean drivers ready for new foam:
Gluing the foam to the speaker cones:
Jig to apply light pressure for glue to dry properly onto the paper cones:
This was a lot of work since a pair of Pentas have 8 midrange drivers, but things are starting to progress.