Is it possible to connect an unpowered (no AC cable) subwoofer to a Yamaha RX-V483 AV receiver? If so, how? - Quora
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Connect Passive subwoofer (not amplified subwoofer) to an 7.1 or more home theater receiver. - YouTube
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How To Connect A Powered Subwoofer To Passive Speakers on Pro Acoustics Tech Talk Episode 62 - YouTube
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