When an amplifier supplies an audio signal with a given voltage output, speakers with a lower impedance draw more electrical current (higher amps) than higher impedance speakers. Speaker impedance and power vs the correct gauge wire Likewise, a larger number is used for smaller wires with fewer conductors. The AWG wire chart uses a numbering system in which thicker cable has a smaller number. Likewise, each AWG wire gauge has an electrical current capacity (how many amps it can handle, also called ampacity sometimes). It specifies sizes, each with a given circular area of the electrical conductor size, its resistance per foot or meter, and some other specifications. Less commonly known as the Brown and Sharpe wire chart, the American Wire Gauge chart has been around since 1857. Speaker wire doesn’t have just one size (gauge) – it’s standardized and based on the American Wire Gauge (AWG) chart which lists standard sizes using a number. What gauge is speaker wire? (Wire size and wire gauge explained) It is true, however, that real copper wire is better than copper coated aluminum wire as I explain later. The electrical signal will not have any measurable difference at the speaker end. As long as you’re using a good quality wire with the correct gauge you’ll be fine. It’s a great marketing feature for retailers but the data shows that there’s an amazingly small difference in performance. It’s not worth spending more money on it. No, oxygen free pure copper wire will not deliver any noticeable improvements in sound or power.
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