Speaker line is also called speaker line, in the industry will also be known as "gold and silver line". It is the line used to connect the amplifier terminal to the speaker, directly through the power signal. And because the current is large, usually the line is very thick, for this wire, the key is to reduce its resistance, so there is often no shielding layer. The thickness of the wire refers to the core: refined copper, tinned copper, silver-plated copper or copper-silver alloy wire. Audio wire is divided into 100 core, 200 core, 300 core and other different specifications, the core refers to the number of copper core corresponding to a single audio wire, the more the number of cores, the better the effect. The speaker line is double-core, such as the 100-core speaker line is divided into two cases. The first is: a single core of 100 cores, that core is 100*2. The second is: double core 100 core, single core 50 core, that is, 50*2. The speaker wire is composed of the corresponding number of copper cores and is also divided into ± grades. The two strands of copper core are generally positive for the refined copper core and negative for the tinned copper core. If the double skin color is red, it is a brass-colored refined copper core, and there will be a red line on the positive side as a mark. The speaker cable generally has no connector, and it is necessary to clip or press the cable on the power amplifier connector and the speaker connector. Speaker cable is mainly used for all kinds of speakers, PA engineering, home theater connection, public space broadcast system. 100W speaker, with 1 square, or 100-150 core refined copper speaker wire. 200W speaker, there is no problem with 1.5-2 square, or 200-300 core refined copper speaker wire. 300W-500W speaker, 2.5-3 square line is enough. If you need to bury audio wire, it is best to use PVC wire pipe to bury. It doesn't make much difference whether it's 200 or 300. If the connection distance is relatively far, the speaker line should be appropriately thick, so as to avoid the power consumption on the line is too obvious.
