HPM-900 Question

I have a pair of HPM-900's and also 100's. They both have these.
They are called Supertweeters and are made of High Polymer Molecular Film.
They only produce sound at the very high end of the frequency range.
So high, I think only my dogs know what they sound like.
 
They should be audible, strange that they're both out, if it has an adjusting pot, try flushing it out with De-oxit, or just try running it back and forth a few times for the contacts. You either have a problem with the speakers or your ears.
 
when you disconnect the other chassis (Woofer, Mid, Tweeter) you can hear the "Supertweeter", when it is WORKING!?

I can hear them on my HPM-1100 not just my dog :D
 
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