zelgy1 Posted August 18, 2019 Report Share Posted August 18, 2019 Hi all! I am currently restoring a pair of AR-5 speakers and would like to thank all of you for the information you have shared on this site. I have a question regarding the insulation within the units I acquired. Please note the speakers are within 2 serial numbers of each other and date stamp on one woofer is April 4th, 1973. I suspect this speaker is completely original. The other speaker appears to have a replacement woofer with a PN 200004-2, which from my research should be ok. My primary question has to do with the insulation. The one I suspect is original was completely filled with the pieced fiberglass insulation. The unit with the replacement woofer only had insulation behind the woofer and covering the crossover with nothing behind the tweeter and mid-range. Is it possible the unit with replacement woofer requires less insulation or did the individual replacing the woofer skimp on the amount of insulation? I was thinking about adding, in both speakers, fiberglass insulation batting acquired from local department store behind the tweeter/mid-range and the original batting behind the woofers. I would appreciate your thoughts on what I should do for insulation. Thanks in advance! Quote Link to comment Share on other sites More sharing options...
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