SDA SRS
ange5
Posts: 2
Have had these speakers in the family since new and will keep them forever...
The tweeters in my left channel are out. I replaced one to test and still out. If this is the crossover is that repairable or do I need to look for one. Is there anything else I should be looking at and testing? I am handy but not an electrical engineer! Thanks
The tweeters in my left channel are out. I replaced one to test and still out. If this is the crossover is that repairable or do I need to look for one. Is there anything else I should be looking at and testing? I am handy but not an electrical engineer! Thanks
Best Answer
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In all likelihood the polyswitch has failed. The polyswitch is a thermal reset device, a fuse if you will. Every time it is tripped it becomes more sensitive and will eventually fail completely.
You can replace it with another or better yet install a .5 ohm 10 or 12 watt Mills resistor.
It's the little blue device in this pic, but may be mustard colored.
Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
Answers
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Thank you this is helpful. To add some questions....
If I were to replace the crossover or crossovers
Would you do both?
I found sources that sell rebuilt crossovers or would you source an electronics shop like are suggested on the Polk site to rebuild mine?
Are there preferred sources out there for rebuilt?
Thank you
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Your best bet is to buy new caps and resistors and populate the board you have. Trusted caps are Sonicap and Clarity, Clarity has 3 price lines. Resistors are Vishay-Mills, Mundorf and Jantzen, move up in wattage from 5 watt to 10-12 watt resistors. Buying rebuilt is more likely a crapshoot as to quality of components. The polypropylene caps will be physically larger, try to stay in the 200v range, so fitting them on the board will be a challange but it is possible.
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When upgrading the crossovers you must do both.I found sources that sell rebuilt crossovers
Post links to those please.
Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk
