ra.ra Posted November 28, 2016 Report Share Posted November 28, 2016 I am slowly working on the restoration of two pairs of Smaller Advents - - one 1972 set with green tweeter and a second 1975 set with the red/orange tweeter. All drivers are good except for this one woofer from the later pair, which was procured via the CSP thread attached. I've never seen a woofer with this sort of damage, but the spider and the voice coil have clearly suffered from an excess of heat build-up, and the fried twisted tinsel wires to the terminals had already frayed to almost complete detachment. Its matching speaker is all fine, but it sounds as if the problem occurred when these speakers were connected to an amp incapable of safely driving 4-ohm speakers. This driver still measured at 3.7 ohms before the brittle tinsel wires became completely detached as I inspected and photographed the situation. The cone and dust cap are good; the basket is good; the magnet is strong. The voice coil former has begun to become loose from the cone. The fourth image is looking into the voice coil former and you can see that there is a hidden dust cap inside the famous spitwad outer dust cap, and the tinsel wires seem to penetrate the cone in between the two dust caps. My question is to solicit suggestions: repair or replace the woofer? Clearly, I could always be on the lookout to buy a replacement driver, but does this appear to be a reasonable candidate for repair? If so, should this only be left in the hands of an experienced professional, or can a reasonably competent DIY-er handle this repair with a few new parts? Link to comment Share on other sites More sharing options...
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