Diva MR

[Al^]

I noticed my MR ribbon is loose from the foam, what kind of glue should I use to tack it back? Thanks Al

[Graz]

Generally there will be a residual bond line on the back of the MR where the foam "houses" are stuck on. When installed, and whilst the foam is acting as a damped support all is well, and the silicone glue does not add to the moving mass. When the foam breaks down it adds to the mass causing all kinds of sound artefacts!

This happens when the foam has broken down to the pint of being useless (normally 15 or so years), generally several years after the MR ribbon has exceeded it's useful life (8-10 years)...

Acetone can remove the silicone/foam crumb, a tricky operation...

Suggested options;-

Strip and fit new 3E ribbons with supports, and ideally with the new circuit return system for best 3E results.

or

Strip and convert to a foil only MR system - involving crossover mods. This actually works rather well...



Take care - Graz