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Auto on/off circuit for subwoofer

I have an inexpensive subwoofer (Koda SW-850) that doesn't have auto on/off feature. I would like to build a simple circuit that senses signal at its speaker level inputs that turns on the sub instantly, and after an absence of signal for about ~5-10 minutes, turns off automatically.

Could anybody provide me a link to built such a circuit?
Thanks


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Topic - Auto on/off circuit for subwoofer - Kursun 03:29:34 01/21/03 (0)


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