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Wiring the PXi50.2 is fairly straightforward. The red wire runs to a 12V ignition source, while the yellow wire is fed a constant 12V. Black of course is a ground wire and that blue wire is the previously mentioned remote out that switches on the amp. The gray and white wires that are visible tucked under the aforementioned wires are speaker outputs should the PXi50.2 be run as the sole source of amplification. The larger pair of black wires at the top are the RCA outputs that run to the amp and a 3.5mm Aux-in for connecting another input device.