Electronics Repair Questions? Ask an Electronics Technician
Hello and sorry you're having problems. Offhand the intermittent popping sounds point directly to the amplifier IC chips failing. More specifically, failing under normal operating voltages/temperatures after initial startup. To fix this would require at least having the IC's replaced (on average a $150 repair), replacing the plate amplifier which is more cost effective, or replacing the powered subwoofer itself- which you can replace for almost the same cost as repairing it- especially since the unit is 12 years old.
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