teknofossil Posted January 11, 2022 Report Share Posted January 11, 2022 In my restoration of my AR-2a systems one issue I wanted to ask here is what might be the appropriate material to replace the damping ring on the woofer diaphragm? These aged rings are about the same rigidity as styrofoam. -T Quote Link to comment Share on other sites More sharing options...
ReliaBill Engineer Posted April 23 Report Share Posted April 23 Was there ever an answer for this? I haven’t touched mine. I’m not going to, unless I find out more about what the original was made from, and whether it was soft foam or rigid foam. I sure don’t want to add weight to it. Anyone know? Soft foam, or rigid foam? Quote Link to comment Share on other sites More sharing options...
ReliaBill Engineer Posted April 27 Report Share Posted April 27 To answer my own question, the foam ring is soft polyurethane foam. I guess to somewhat damp a possible source of distortion near the voice coil. Flexing of the cone? Quote Link to comment Share on other sites More sharing options...
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