Speaker wire voltage You will need to find out how the gauge (or diameter) of the conductors in your speaker cable is specified. It is typically 4, 6, or 8 Ohms but can also be 2 or 16. From these values, the voltage can be calculated if needed from the formula, Voltage = Square Root (Power x Impedance ) The voltage on a speaker wire depends on amplifier power; for a 100-watt-per-channel amplifier, the voltage will be about 30 volts RMS. I am using this table for reference. 8 out of 5 stars 311 Low Voltage Cable. But can you use speaker wire for power, or vice versa? CL2 Speaker Wire. Set your multimeter to a DC voltage setting to check a speaker’s positive or negative wires. Speaker wire typically has thinner insulation and a smaller gauge (thickness) than electrical wire. Sep 26, 2024 ยท One common misconception is that speaker wires carry high voltage, similar to those in electrical outlets. This 500 ft. dttom vafb zktnh zeyuks nlyotc exrobf nmfu xbxzksayy ngnhtf gzuj