How far to separate power from speaker wires. So as long as I can remember I've been told to keep the speaker wires on the opposing side of the car because of interference from the power wire. After reading I hear it may not matter as much? But I want to amp my speakers now and trying to fit both amps into my truck cleanly....the power wire is getting close to   the signal wires. So I'm just wondering, what's the minimum I can separate them?