Audio enthusiasts are very particular about the choice of speaker cable. I have heard that there are many people who spend more than 10,000 yuan to buy a cable. The other extreme of the speaker cable is to just find a wire to connect it to and make a sound. Let us leave these two extremes and look at the choice of speaker cable from a technical point of view. Obviously, a wire that is too thin will not have good results, because the resistance of a thin wire is large, and more power will be consumed on the resistance of the wire, and the loss of bass is particularly serious. Although the resistance of a wire that is too thick is small, it causes a waste of materials and money.
It is generally considered that the loss (insertion loss) on the wire is tolerable below 0.5dB. In this part of the circuit from the output of the power amplifier to the speaker, the impedance of the speaker, the length of the wire, and the thickness of the wire are all important. The general method is to calculate the thickness of the wire based on the length of the wire and the impedance of the speaker.
We can make the difference from the structure, materials and appearance of the wire: fever-grade wires are made of higher-purity ES-OCC (Oxygen Single Crystal Copper) or OFEC (Oxygen-Free Electrolytic Copper) to make conductor copper wires. The hand feel is flexible, tensile and flexural, and the counterfeit wires are made of ordinary copper thin wires as conductor materials. In addition, the authenticity of the wires can be correctly judged from the appearance of the wires. Generally, the authentic brand fever wires It has a trademark, the typeface of the model is printed very clearly, and it is difficult to rub off, and the appearance of the craft is exquisite and standardized.
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