Metal wire used to connect the speaker-level outputs of an amplifier to the bindings on a speaker with the job of transferring power from the amplifier to the speaker. Speaker wire comes in a variety of styles with a variety of particular “features” varying from manufacturer to manufacturer. The most basic speaker wire, also know as zip cord, is a thin, light gauge wire. peaker wire is often made of copper, a good quality conductor for the price. The actual metal wire is encased in some for of plastic-like coating that insulates the wire while still allowing the wire to be easily bent and turned. Most high-quality speaker wire is fairly thick with a gauge around 12, with some wire even thicker. uality wires are usually terminated in some sort of metal connector. The most commonly used of these connectors are spade lugs, banana connectors, and pin connectors with spade lugs and bananas being the best quality connectors. Bare wire without a connector may also be used without the benefit of a wire termination. peaker cables should be heavy gauges with gold-plated spade lug or banana connectors for good signal transfer between amplifiers and speakers. Lengths of speaker cable should be kept to a minimum and the lengths used should be the same for left and right speakers. Long runs of speaker wire should be heavy gauge to ensure enough power is transferred and the amplifier is not presented with too great an impedance or resistance. Speaker wire has its own impedance or resistance to the flow of electric current with heavier gauge cables having lower resistance ratings allowing the efficient flow of power from the amplifier to the speakers.