In the audio equipment, the wire is specially used to connect the power amplifier and the speaker. Since the speaker wire transmits a power signal, there should not be too much signal loss on it, which objectively requires the speaker wire to have excellent electrical conductivity. , Excellent electrical conductivity requires the wire to have extreme transmission capabilities. The main technical indicators currently used to measure these two points are the N value and the number of wire strands. The N value is a parameter that reflects the purity of the metal used in the production of the speaker wire. Generally, OFC oxygen-free copper and tinned copper +/- are easy to distinguish. Mainly used in various types of loudspeakers, PA engineering, home theater connection, public space broadcasting system.