What signals does the wire transmit?

1. The standard level signal line refers to the connection line between the audio source and the power source. Its transmission level is about 1V, and it is also a shielded transmission line. This type of wire is the most widely used in the audio industry. Interestingly, wires made of different insulating media and metallic materials have subtle effects on sound quality. Therefore, manufacturers have produced various types and sizes of wires to meet the requirements of different levels of music appreciation. High-grade finished wire, the outer layer is made of nylon braided sleeve, the inner layer is lined with metal shielding sleeve, and then the core wire is made of oxygen-free pure copper, and then equipped with gold-plated plugs to prevent noise caused by poor contact of the plugs.

2. The strong signal line refers to the connection line between the speaker and the power amplifier. Such wires usually have no shield. For this kind of wire, the key is to reduce its resistance. Since the output resistance of modern power amplifiers is very low, the requirements for speaker wires have also increased, such as the choice of large cross-sectional area or stranded wire. Wires range from pure copper to silver wire. The more expensive speaker wire is the oxygen-free copper speaker wire. Its main features are good conductivity and low resistivity. When the sound is reproduced, the timbre increases a lot.

3. The weak signal line refers to the connection between the microphone and the preamplifier or the digital audio source and the decoder, usually a shielded line. Digital lines belong to such weak signal lines. Due to the greatly improved fidelity and sensitivity of the current audio equipment, the requirements for signal transmission are getting higher and higher, but the signal line is used to transmit digital pulse signals or audio AC signals. Its transmission principle is much more complicated than ordinary DC transmission. In addition to the electrical resistance and magnetic field of the current passing through the wire, there is also the skin harvesting effect and phase distortion between high and low frequencies. The wire should transmit the entire audio frequency band (20Hz~20kHz or wider) with balance and low distortion, so the design of the wire should be very strict. Only then can the signal be amplified by high-fidelity and the sound can be recovered by the speaker.