Polk TSI 500 tweeter problem - likely crossover issue

JBNZ

Hello,

I've been using the TSI 500 as lounge speakers for a few years with no issues. Recently it appeared that one of the tweeters died on one of the speakers. I really am not sure what caused it as they haven't been tampered with and are only ever played at relatively benign sound levels.

Anyway, I swapped the tweeters on the two speakers to see if it was a problem with the tweeter itself, however both tweeters worked on the working speaker and didn't work on the dud one. I'm thinking there must be some problem in the crossover controller but haven't managed to get far enough into the cabinet to investigate too much further. On close listening to the tweeter when its hooked up in the defective speaker, there is some faint tweeter output, it's just very very quiet.

My questions are:
- What is the most likely cause of this problem?
- Are there resistors of wiring on the cross-over board that can cause this problem?
- What is the best way of finding out the cause of the problem?
- How do I easily get the cross-point seeing as it's wired up still?

Unfortunately I live in NZ so I'm too far to send these to the factory. Any help / advice would be greatly appreciated.

[Deleted User]

Hello,
Usually problems with a speaker's crossover can be seen, resistors that are browned, capacitors that show leaking or expanded casings. In all likelihood you should be able to remove the input plate on the rear of the cabinet and see the crossover.
For service either the dealer who sold you the speakers or the importer for New Zealand should be able to help. If the dealer is not able then send an email to polkcs@polkaudio.com and ask for the contact information for the NZ importer.
Regards, Ken

JBNZ

Thanks,

I took the crossover plate off but can't see any damage to the unit and the wires seem to be intact. I'm not sure why the tweeter has decided to stop working. I'll try giving them an email and see if I can get hold of the importer.