Heritage I've bough second hand at times already has a Blown tweeter. PWK struggled with this.....In fact I heard Valerie (his wife that just deceased) go on and on about a story with PWK and his fits with the tweeters. The HII had a different tweeter than the original.....and it wasn't as much of a problem.
I like phenolic diaphragms in the mids. Odds are they are fine.
As said....Bob Crites is the best resource. I have bought many many things from here over the years.
If all drivers work, move on and enjoy. The refresher I would do with them.....if I was to improve the sound, is to replace the capacitors on the boards. Easy.
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McIntosh C48 McIntosh MC1201's McIntosh MC275 MonoBlocked X4 McIntosh MC250 X2 McIntosh MC7104 Classic Bob Crites Cornscala DBX Venu360 Technics SL-1200MK2PK Klipsch KP-600s Concert system Schiit Yggdrasil Klipsch Cinema KPT-684's modified Custom PC music player
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