I have to change voice coil on Skaaning woofer. Per Skaaning kindly sent me a proper VC and spider assembly. He offered to recoil the woofer for $75. The catch is shipping would run into $200. I reconned, changed surrounds and aligned quite a few drivers but never changed the coil. I figured that if I won't be able to do it a friendly speaker repair guy will do it. It turned out friendly speaker repair guy had a stroke and closed the shop. The main problem is that the VC is epoxied to a poly cone and I'm not sure how to detach it. I know that heating up would soften the epoxy but I'm afraid to deform the cone which is not available anymore. Any suggestions ?
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I have never done it either, but I think if I had to, I would use a Dremel to first cut the old coil close to the cone with a cutting disk, and after that use a rotating sanding tool to remove the glue.
Epoxy doesn’t really soften when you heat it. Polycone will, so: no good plan. A dremel also might induce too much heat. But you probably can peal or cut the epoxy from the cone, using a scalpel.
Fortunately, since the coil former material is aluminium , it can be easily peeled away from the polypropylene cone. Unwind the coil wire as a first step. Most likely the old adhesive will stay attached to the cone apex and a light sanding of the remnant circular hole will allow a tight fit of the replacement coil to be achieved.
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