Generally, for long-distance power transmission, either increase the wire diameter of the speaker cable or increase the output voltage, but when the voltage is increased, the signal reduction will also decrease, and high fidelity cannot be achieved! Then try to extend the length of the front-end signal cable and shorten the speaker cable. High-fidelity is to achieve "lossless" as much as possible, so the wire diameter is increased and the distance is shortened. Generally, the audio cable of high-fidelity audio does not exceed 3 meters, and there is a thick anti-interference layer outside the audio cable for high security True (HIFI). One is that no matter how good the material is, all the wires of the loudspeaker will suffer losses if they are long. In other words, long speaker wires are like resistors.