Audio is a kind of metaphysics, but it is a kind of belief, but in fact, the wire connecting the audio equipment is more “fantasy”, and a complete wire consists of a plug and line. A set of audio equipment is a professional or civilian level, and all audio wire connections can be used, and some of the commonly used plugs and wires will be described below.
1. Connection plugs of common audio video equipment
In an audio and video project, the input signal type can be divided into audio signals and video signals (this time only brief introduction); audio signal can be divided into balanced signals and non-balanced signals depending on the impedance. (Sound source equipment such as DVD player / card / CD player and output are more non-balanced signals). Therefore, the connection plug also has a balance and unbalanced division, the balanced plug is a three-core structure, and the non-balanced plug is a two-core structure. There is also a dedicated plug for amplifiers and speaker connections in the audio plug. This plug is common as a four-core structure (also two cores, eight-core) is because it is invented by Switzerland Neutrik, so it is also known as “Neutrik.” (New Duanke) plug “or” four-core (two core, eight-core) speaker plug “.
1.1, commonly used balance signal plug:
A, Card Plug (XLR): Card is divided into a card (XLR Male) and the XLR Female. Card, the mother’s distinguish is very simple, with the “needle” “male”, with “hole” as “female”. Many audio equipment input, the output port is the card, and the interface with the “needle” is “the whole”, the interface with “holes” is “master”.
B, large three-core plug or 6.3mm three-core plug (Phonejack Balance):
1.2, commonly used non-balanced signal plugs:
A, large two-core plug (Phonejack Unbalance)
B, lotus plug (RCA)
C, small three-core plug or 3.5mm three-core plug
The appearance of the small three-core plug is similar to the large three-core plug. The small three-core plug is a three-core, and the three cores have been used as balanced signal plugs, but in the usual audio engineering, small three-core plugs are used for audio signal output of computers and portable sources (portable CD / MP3, etc.), so small three cores The plug is classified into the unbalanced signal plug.
1.3, Neutrik Speak: Speak:
The Neutrik plug is commonly used for the four-core, and the second core, an octocket speaker plug, and their appearance is basically the same, only the difference in size. Normally, the interface of the speaker is a four-core plug, such as the back of the octox plug speaker, marking; the output port of the amplifier is a four-core plug.
1.4, common video connection plug:
The lotus plug is mainly an output of analog video signal, input, such as DVD video (image) output / small projector video (image) input; BNC or Q9 plug mainly uses the output of analog video, input For the input of some video matrices, the video input (component video) / professional monitor of the output / large projector. The role of lotus plugs and BNC plugs in video systems is the same as the interface.
The video connection plug is also used in a VGA plug in a computer video signal. The interface shape is a trapezoidal 15 needle, a branch, a female plug, a male head, a pin, a wood. Refer to the computer host and display cable plug.
2, common audio wire
The audio wire has a microphone line (audio cable), audio cable and speaker cable:
A, microphone line
The microphone line is a mold shield (according to strict requirements, the strand should be an oxygen-free copper material), and each core is a plurality of fine copper wires. It is usually composed of a two-core, a sheath layer of each core, a tensile cotton filler, a shield and an outer rubber sheath layer. The outer rubber sheath layer of the microphone line is usually black, also with red, yellow, blue, green and other different colors. The shield is divided into two types, wound into the outer portion of the two core and cotton yarn fillers, and prepared as the shield layer in the outer side of the two core and cotton filler. The compilation of the shielded microphone line is better than the physical perspective, and the price is also too expensive. The microphone line can also be connected between the devices, but the cost is highly recommended to connect the device when connecting the device.
B, audio cable
The audio cable is also similar to the core strip shielding structure. The two cores and shields are the copper plating appearance as silver white. The audio cable has no cotton yarn filler tensile strength difference, so it is rarely used for microphone connections, which can be used for short distance temporary connection microphone in special cases. The device is usually connected to the device interior in the audio engineering using an audio cable, since the audio cable is thinner than the microphone line, the bundle of the wire of the cabinet, is relatively beautiful and cost is lower than the microphone.
C, audio signal cable
The audio signal cable is actually a combination of several audio cables in a cable. Since the number of internal audio cables is different, there are 4, 8, 12, 24, etc. The weight of the audio signal cable is large, and there is a steel wire inside the usual cable to increase the tensile strength. Audio Signal Cables are used for signal transmission connection of peripherals and amplifiers in the field performance, and signal connections to the stage in the control room to the stage.
D, speaker line
The speaker line has a protective sound box line from the appearance, the gold and silver line, the sheath line according to the different outer sheath and the use occasion, and the rubber box line and the plastic sleeve line, etc.; the gold and silver tone line is usually Transparent or semi-transparent sheathed wrapped golden and tone copper wires are commonly known as “gold and silver wire”, and there are two cores that are colored but usually printed on the outer sheath of one core to be printed in two cores. Distinguish. In summary, the speaker line is most basic for the two copper wires with a sheath. The speaker line has a multi-core speaker line such as a four-core speaker line depending on the requirements of the use requirements. The speaker line has a cross-sectional area, that is, the copper core is thick and different, such as 1 square, 2 square, 4 square. The smaller the power loss when the cross-sectional area is transmitted.