CTLOC4 Car 4 Channel Speaker Wire To 4 Low Level RCA Output Line Converter: Amazon.co.uk: Electronics & Photo
Amazon.com: Elite Audio Premium Series 100% OFC Copper RCA Interconnects Stereo Cable, 4 Channel 15' Cord (4 x RCA Male to 4 x RCA Male Audio Cable, Double-Shielded with Noise Reduction, 15
Sky High Car Audio 2 Channel Twisted 6 ft RCA Cables Coated 6' OFC 747150663067 | eBay
Sky High Car Audio 4 Channel Twisted 20 FT RCA Cables Coated 20' OFC for sale online | eBay
Sky High Car Audio Twisted 2-Channel RCA - 1.5ft
EFX 4-Channel RCA Patch Cables (20-foot) Delta Series twisted pair multi-core RCA patch cables at Crutchfield
In Phase 2-Channel Speaker Level to Line Output Converter