Mr. Lou Posted December 29, 2019 Share Posted December 29, 2019 I’ve looked up info on dating Heresy speakers but I’m not sure how to decode this serial number. Can someone help me out? Quote Link to comment Share on other sites More sharing options...
dtr20 Posted December 30, 2019 Share Posted December 30, 2019 The S in the serial number is for 1978 Quote Link to comment Share on other sites More sharing options...
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