From: utzoo!decvax!harpo!floyd!vax135!ariel!houti!lime!we13!rjr Newsgroups: net.audio Title: speaker inquiry Article-I.D.: we13.367 Posted: Tue Jan 18 14:21:51 1983 Received: Thu Jan 20 06:50:16 1983 I have a set of "Ionovac" tweeters that were made in the 50's by both DuKane corporation and Electrovoice. I am looking for any printed information on these as well as any maintenance info. I am told that the "element" wears out after a period of use (does anyone know if this is true?). Bob Roehrig we13!rjr Bob Roehrig ...we13!rjr