Making your own DIY Plug and Play Subwoofer Cable (instructions inside) - AudiWorld Forums
MPS E-310 99.9997% 5N Silver Plated OFC Audio Cable Wire Line For Hifi DIY
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Subwoofer Cable, 6-Feet RCA Male to 3.5mm 1/8" Monaural Mini Mono Male Plug Jack Connector Audio Trigger Cables – Ancable