“I just connected my Denon AVR-S740H to my Polk PSW108 subs using an Insignia 3.5mm Mini to RCA stereo audio cable. I get no audio from the subs but a loud humming instead. With power to the subs from any source and no audio cables there is no hum. Why?”
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I had the same issue so I had my sub installed by the geek squad for fifty bucks and worth every penny.” ElITE MEMBER” save the headache and enjoy the movie.
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