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Re: HPM-100 tweeters

Did you establish the tweeters are blown by testing them individually, out of the speaker system? If the high-pass capacitors are of electrolitic construction (labeled NP, bi-polar, or with +,+ at both ends), their failure with age can mimic a *blown* tweeter via not passing signal to the tweeter. Oxidised tweeter level controls can also fail to pass signal. Perhaps clean the controls & replace the old capacitors 1st (a basic & oft required maintenance). A local RadioShack store will have electronic control cleaner in spray can & non-polar capacitors for speaker crossover duty that will do fine for checking now (blocks low frequency from tweeter), even if you decide on another brand or type capacitor for the permanent restoration.


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