In order to achieve contact transmission, communication, etc. between the equipment and the equipment in the sound system, it must rely on the tools connected to it, which is the wire and the joint. It occupies a very important role in the entire audio system. Now there are many types of connectors and connectors used in professional audio systems. Below we briefly introduce the common types of wires and connectors:
First, all kinds of wire
1. Professional audio cable: Now the audio cable has two cores, three cores, four cores, five cores, etc. This kind of line can be used to transmit high quality audio signals because of good shielding effect; now more professional microphones generally use three cores. The above wire, this wire has strong anti-interference ability and can be transmitted over long distances. Of course, this wire can also transmit other signals, such as DMX512 control signals for transmitting computer lights.
2, coaxial cable: generally used in video, there are some audio cables, because this wire is less anti-interference ability, coupled with the design is not mainly used to transmit audio signals, so it is not suitable for long distance Audio signal transmission.
3. Concentrated cable: It is the multiple signal wires wrapped in the same protection tube, which is generally used inside the connection system to reduce the number of independent wires. It is now also used in special vehicles such as TV OB vans, underground pre-buried and other. This kind of line is generally processed by professional manufacturers, and the quality is more secure.
4. Optical fiber: Many transmission cables commonly used in recording and reproducing equipment such as CD or MD, which transmit digital signals. With the popularity of digitalization, the use of optical fiber in audio systems will increase in the future.
5. MIDI cable: Usually a five-core cable that transmits information about MIDI. Most of it is now used on keyboards, effects, and other devices.
6, there are some special wires, such as the multi-core cable used in the computer VOD system used to connect to the network can now also be used to transmit audio and video, to achieve computer auto-on-demand function.
Second, a variety of connectors:
1. XLR: commonly known as the Cannon joint, which is composed of three joints, 1-- Ground, 2--hot (+), 3--cold (-) Of course, there are some devices that specify 3 as the hot end (+ level); 2 is the cold end (-level), which depends on the equipment manual. The cassette connection plug-in is the most widely used type of connector in the professional audio system. It can be used to transmit various types of audio signals in the audio system. Generally, the balanced input and output terminals are connected by using the card connector. In a sense, the use of a card connector is also one of the characteristics of a professional audio system that is different from a civilian audio. The benefits are:
a. Using balanced transmission mode, it has strong resistance to external interference, which is conducive to long-distance transmission.
b. With spring locking device, the connection is reliable and it is not easy to pull off.
c. The connector specifies the signal flow direction to prevent errors on the connection.
The plug has a male plug and a female plug, and the socket also has a male socket and a female socket. The male plug is the pin, and the female plug is the jack. According to the common practice in the world, the input terminal is used as a signal with a male plug or socket; the female plug and socket are used as the output end of the signal.
2, RCA: commonly known in China as the lotus head (because of some types of RCA connectors look like lotus petals), this joint is composed of two joints, respectively hot (+ level); cold end grounding (- Level), which uses coaxial cable connection, of course, can also use multi-core audio cable, often used in general home audio equipment. Because it is about 3.5 cm in length, I usually call it: 3.5cm plug.
3, TRS: generally called stereo connector, it is composed of three contacts, respectively: head end (+ level); ring end (-level); ground (Ground), used in small headphones on the length of 3.5 cm Left and right, but it is still used in professional audio. Its length is 6.35 cm. At present, the high-impedance input and plug-in socket of professional mixers mostly use this plug. Most other audio equipments also use this port.
4, TS: commonly known as mono (sound) connector, this connector is composed of two contacts, respectively, the head end (+ level); ground (Ground). The above two connectors, used in professional audio, have a length of 6.35 cm, so I usually call it a 6.35 cm plug. Although the TS connector and the TRS connector are the same length and similar in appearance, the specific functions can be different. The TRS stereo connector can transmit signals in a balanced manner with a three-core cable; however, the TS mono connector can only use unbalanced signaling. the way.
5, MIDI connector: Use the connector on the MIDI application, there are five pins to transmit information about MIDI.
6, speaker connector, now generally use four-core professional connector, and some use TS mono connector or other methods.
7, all kinds of adapters: you can easily use this connector to switch between a variety of different joints.
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