I had purchased a set of these on craiglist a while back hoping to get the woofers re-cone but the speaker place that I go to can not get the repair parts for it, so all I had to do was replace this board with a working board from the ones that I bought and I am in business.
The same thing happened to 13-year old M1s. I'd like to just replace the capacitor but the circuit board is so burnt that even the copper has burnt off.
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