Where do I connect blue amp wire?
Is the blue speaker wire positive or negative?
Same copper wire, just different plastic coatings. If it helps to keep everything wiring correctly for you, then use the blue stripe for all of your negative connections. You have made a good buy. Excellent speaker wire!
Are radio wires color coded?
Manufacturers have made connecting a car stereo to an wiring harness relatively easy with color coded wires. In the table below, we show what those wires do and what the colors mean.