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air max Pas Cher  VAC (Volts Alternating Current) the more prominent the noise will be.  Imagine a power cable with an invisible field around it encompassing 18 inches or so in either direction. Anything within that 18 inches will get a buzz, the closer to the center of that field the louder the Buzz will be. This field is the inductance field of the cable. 18 inches is the approximate area that the inductance will occur.  Speaker cable are wires that usually are encompassed by a clear plastic insulator running parallel to each other. There is usually no twisting of the pair involved. This makes the cable a perfect antenna and will easily pick up noise or interference from another cable. Thus, when a speaker cable is placed too close to an Electrical or power cable, the 60 Hz signal easily transfers to the antenna that a speaker cable operates like. Your speakers when powered by an amplifier will play this constant buzz from the electrical circuit.  The closest that I would recommend running a speaker cable to an electrical power cable is around 18 inches or so, though there is a good success rate at 12 inches or so. Any closer than that inductance will occur and then your speakers will have a 60 Hz hum play on them any time the amplifier is turned on.   Possible solutions if you cannot separate your speaker cables from your power cable by 18 inches vary, I will cover the three most often used.