AudioQuest Black Lab - RCA Interconnect Subwoofer Cable — The Audio Co.
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Amazon.com: Amazon Basics RCA Audio Cable for Stereo Speaker or Subwoofer with Gold-Plated Plugs, 35 Foot, Black
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Amazon.com: KabelDirekt – RCA extension cable – 25 ft – extra break-resistant Hybid cable for brilliant sound quality (subwoofer/audio cable, RCA male to female, ideal for amplifier/HiFi, analog & digital) : Electronics