khorndog Posted April 1, 2012 Share Posted April 1, 2012 This Stephens Tru-Sonic is from a 1954 Khorn. The sound seems to be unaffecterd. Looks like battery acid corrosion. What is it?? Quote Link to comment Share on other sites More sharing options...
dmonte Posted April 2, 2012 Share Posted April 2, 2012 That is a classic case of replica Rot, and there is no known cure[] Quote Link to comment Share on other sites More sharing options...
JJkizak Posted April 2, 2012 Share Posted April 2, 2012 I have a vague memory that Klipsch sprayed some kind of preservative/anti bug stuff inside the K-horns. JJK Quote Link to comment Share on other sites More sharing options...
djk Posted April 2, 2012 Share Posted April 2, 2012 It's oxidation of the plating meant to stop the magnet structure low-carbon steel pieces from rusting. Quote Link to comment Share on other sites More sharing options...
T.H.E. Droid Posted April 2, 2012 Share Posted April 2, 2012 If the shroud and end cap are castings, most likely this is an example of pot metal decay, which is very common. Pot metal is sensitive to humidity and moisture and I've even seen it self-destruct all by itself. If the shroud is sheet metal and the cap a casting, it could be an example of galvanic corrosion caused by the proximity of two dissimilar metals. It may also be a reaction between the paint, the metal underneath, and moisture. Even though it is buried inside the woofer box, moisture can still get in through the cone. Does the bass cab look like it was ever exposed to water on the bottom? Quote Link to comment Share on other sites More sharing options...
khorndog Posted April 3, 2012 Author Share Posted April 3, 2012 The cabinet has never suffered any direct water damage. Is there a way to stop the corrosion? would it hurt to remove the woofer from the cabinet and wire bruch the stuff off/ then seal it with simething???? Quote Link to comment Share on other sites More sharing options...
djk Posted April 3, 2012 Share Posted April 3, 2012 "If the shroud and end cap are castings, most likely this is an example of pot metal decay, which is very common. " They are low-cabon steel, as already mentioned. The cylindrical part is sliced from a piece of tube, and the back plate is welded on. They may be coated with a zinc chromate, or something similar (to inhibit rust). Quote Link to comment Share on other sites More sharing options...
billybob Posted April 8, 2012 Share Posted April 8, 2012 Navel Jelly?[A] Quote Link to comment Share on other sites More sharing options...
djk Posted April 8, 2012 Share Posted April 8, 2012 Looks don't matter. What does is the gap where the voice-coil resides, and you can't do anything about that. Ignore it. Quote Link to comment Share on other sites More sharing options...
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