Crutchfield Reference 4-Channel RCA Patch Cables (17-foot) Available in 2 different lengths at Crutchfield
Belva BAK84 8 Gauge Premium (CCA) Copper Clad Aluminum Complete 4-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 600 Watts - RED - Walmart.com
Amazon.com: KICKER Speakers and Amp Package of 4 Items: 3" PowerSports Handlebars Speakers 4-ohm Black with DS18 440W Class D 4-Channel Amplifier, RCA Cable (16FT), and 16AWG Speaker Wire (20FT) : Electronics