A rca lead/cable provide input signal from your car head unit, to your car amplifier. Once your car amplifier receives the input, it amplifies it and creates a bigger output, which is the main purpose of a car amplifier To make that possible, first you have to wire your rca leads and connect one side to the car stereo and other side to the car amplifier.
Instructions on how to wire and connect rca leads:
1)Remove you car head unit from your dashboard.
2)Once you have removed it successfully, locate the back of it and look for a rca outputs.
3)Once you have located the rca outputs, on you car stereo, connect the rca connectors into the rca outputs, matching the red and white colours.
4)Now locate you car amplifier and find the rca inputs. Once you have found them, connect the other end of the rca cable into the rca inputs on the car amp, matching the colours.
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