kwon oh in Posted June 11, 2015 Report Share Posted June 11, 2015 I'm new here and have a pair of early KLH 6 speakers(epoxied woofers and tweeters version)The woofer looks porous. Should I seal on cloth surrounds and dust cap?thanks Link to comment Share on other sites More sharing options...
JKent Posted June 11, 2015 Report Share Posted June 11, 2015 Welcome to the CSP!To answer your question: Maybe.You should test the woofer seal by pushing the woofer in. Use 3 fingers like a tripod around the dust cap and push. If the woofer cone springs back out immediately there is a leak. It should take about 2 seconds for it to slowly return.If you need to seal them, do NOT use any home-brew remedy. ONLY use the butyl rubber sealant that Roy cooked up. It's sold by ebay seller Vintage AR or, as a CSP member, you may be able to purchase directly from Roy at a lower cost.See Service Bulletin 60 in the Library here: http://www.classicspeakerpages.net/library/klh/other/klh_schematicsservice/klh_service_bulletin_60.pdf-Kent Link to comment Share on other sites More sharing options...
kwon oh in Posted June 11, 2015 Author Report Share Posted June 11, 2015 Thank you for kind answer.I try to seal the speakers accoring to your advice. Link to comment Share on other sites More sharing options...
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