EFX 4-Channel RCA Patch Cables (20-foot) Delta Series twisted pair multi-core RCA patch cables at Crutchfield
Full Tilt Audio High Quality 20 Foot 2-Channel Car Audio RCA Interconnect Cable
Metra Electronics 20ft RCA Audio Cable
Amazon.com: DS18 R20 RCA Cable Ultra Flex 20 Feet - 2-Male to 2-Male Stereo Audio Cables, 2RCA Male to 2RCA Male Stereo Cable for Home Theater, HDTV, Amplifiers, Hi-Fi Systems, Car Audio,
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Amazon.com: Sky High Car Audio 4 Channel Twisted 20 ft RCA Cables Coated 20' OFC : Electronics
Amazon.com: DS18 R20 RCA Cable Ultra Flex 20 Feet - 2-Male to 2-Male Stereo Audio Cables, 2RCA Male to 2RCA Male Stereo Cable for Home Theater, HDTV, Amplifiers, Hi-Fi Systems, Car Audio,
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Sky High Car Audio 20 ft 4 Channel PREMIUM RCA Cable Nylon Copper Braided 6.5 M | eBay