What kinds of signals does the cable transmit?
2023-06-20
1) Standard level signal line is the connection line between the audio source and the amplifier, it is the transmission level of about 1V, but also the shielded transmission line. This line is the most widely used in the audio and video room audio industry, it is interesting that the wire made of different insulation media and metal materials have a subtle impact on the sound quality, for this reason manufacturers produce a variety of models and specifications of the wire to meet the different requirements of the level of music appreciation. High-grade finished line, coated with anti-static layer of nylon braided sleeve for the outer layer, lined with metal shielding sleeve and then oxygen-free pure copper for the core, and then with gold-plated plugs to prevent bad plug contact and noise.
2) strong signal line refers to the connection between the speaker and the amplifier, such lines are often no shielding layer, for this wire, the key is to reduce its resistance, because the output resistance of modern amplifiers is very low, so the requirements of the speaker line is also increased, such as the use of large cross-sectional area or multi-strand stranded wire. Wire from pure copper to silver wire are available, more expensive a speaker wire for oxygen-free copper speaker line, its main feature is good conductivity, low resistivity, the use of it in the playback of sound tone increased a lot.
3) Weak signal line refers to the microphone to the preamplifier or digital audio source to the decoder between the line, usually shielded line. Digital line belongs to this kind of weak signal line. As the current audio-visual room audio equipment fax degree and sensitivity has increased, the requirements for signal transmission is also increasingly high, but the signal line is used to transmit digital pulse signal or audio AC signal, its transmission principle is much more complex than the general DC transmission, in addition to the current flow through the wire can be affected by the resistance of the wire and generate magnetic fields, there is a skin effect between high and low frequency, phase Distortion and other effects, the wire to balance, low distortion to transmit the full audio band (20Hz ~ 20kHz or wider) of the signal, then the line design should be very strict, only so that the signal can be high fax amplification, by the speaker to restore the sound.
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