A set of sound systems contains many cables, such as audio signal lines, microphone cables, speaker cables, HDMI cables, power cords, etc., which are collectively referred to as [audio cables]. The [speaker cable] we regularly say is only one of the audio lines, which refers to the cable connecting the amplifier and the speaker.
Noise, broken tone, signal loss due to open circuit, and damage to the output due to short circuit may all be caused by the wire.
No matter how high the quality of your microphone, amplifier or other equipment is, a bad signal line can cause the quality of the entire system to deteriorate or even make no sound. The party house sound system is equipped with a high-definition cable, supporting 4K 60Hz, signal lossless transmission, high-definition and stable picture quality, eliminating the trouble of wire selection.
Never try to save money on wire, a good sound system deserves to be equipped with high-quality wire. Today we will talk about the choice of speaker cable and the precautions for the use of audio cables.
The use of the sound cable
Audio equipment has a special use as a power amplifier and speaker between the connection of the wire, the audio line is mainly responsible for the audio equipment to connect, transmit audio, video signals, which requires it to have excellent conductivity and high-quality transmission capabilities.
But in fact, many people think that the audio line is only an accessory in a set of sound systems, no need to pay too much attention, even if you find a few at random, you can make the sound and play the picture, but you don't know that the picture quality and sound quality presented in that way are greatly reduced.
Whether it is from the playback source to the amplifier to the speaker, or from the playback source to the projector, these transmission processes will be because the cable itself is not good and lead to a weak signal, tv, projector can not restore the realistic picture, the speaker can not produce high-fidelity sound. Therefore, friends who are using the audio or are about to start the audio, it is particularly necessary to know more about the audio line, and make a reasonable choice of the wire, plus the correct use method, in order to play the more ideal effect of the sound.
In order to play the ideal sound effect, in addition to the need for good quality of the sound itself, each part of the wire can not be sloppy, otherwise it will be "abandoned", even if it costs a lot of money to buy a good quality audio, the final result is only a discounted sound and picture effect.
How to choose a speaker cable
Speaker line, commonly known as speaker line, is mainly used for the connection of power amplifiers and main speakers and surround speakers. Compared with the video line and the audio line, the current signal it circulates is relatively large, which is the main reason why the speaker line often sees no shielding layer. For the speaker line, the key is to reduce its resistance, because the output resistance of the power amplifier is very low, so the requirements for the speaker line are getting higher and higher. Speaker lines are generally divided into copper-plated audio lines and oxygen-free copper audio lines. The main characteristics of oxygen-free copper speaker wire (gold and silver wire) are good conductivity and low resistivity.
The speaker cable is divided into 100 cores, 200 cores, 300 cores, 500 cores and 600 cores. The number of cores refers to the corresponding number of copper cores that make up the speaker line, and the more the general number of cores, the better the effect, and the higher the price, of course. 1. What is a 100-core speaker cable?
The speaker cable is two-core, and the 100-core speaker cable is divided into two cases. The first case: single core 100 core, that double core is 100 * 2; the second case: double core 100 core, single core 50 core. i.e. 50*2. So what is the real 100-core speaker cable? Refers to a single core of 100 cores, the first case, do not be fooled by bad businesses. Now many merchants are adding two wires together to calculate how many cores, confusing the concept of core number, mainly want to use 50 cores * 2 cores of the line to sell a 100 core * 2 core price, many non-professional users do not understand this concept.
We must know that the power is not directly related to the core number of the speaker cable, but is directly related to the cross-sectional area and material of the speaker wire conductor. The core can not be more, but it can not be less. The strength of the single core wire is enough, but the separation is not good. The multi-core wire separation is enough, but the strength is insufficient. So there is no specific say how many cores, to see your current sound effect requirements, if you now feel that the low frequency is not strong enough, then you can choose a smaller number of core speaker lines, if the sense of hierarchy, stereoscopic sense is not obvious enough, the sound is mixed together, then you have to use multi-core lines, as for the specific amount, according to the on-site hearing effect, you need to slowly adjust yourself. 2, the choice of speaker cable is recommended to connect 100W speakers, it is recommended to choose 1 square, or 100-150 core oxygen-free copper audio cable. Connected to the 200W speaker, it is recommended to use 1.5-2 square meters, or 200-300 core oxygen-free copper audio cable. Connect 300W-500W speakers, it is recommended to choose 2.5-3 square lines is enough. If you need to bury the speaker cable, it is best to use PVC pipes for laying. The actual effect of the scene is 200 core or 300 core speaker cable does not sound much difference. If the wiring distance is relatively far, the speaker cable should be appropriately thickened to avoid the power consumed on the line being too obvious and causing the hearing effect to be weakened. 3. How to convert the square of the speaker core? Such as 100 cores, the current speaker wire on the market is generally about 0.1mm diameter, how to calculate its square? Single core cross-sectional area formula: π * R² = that is, the square of the radius of 3.14 * and then multiply by the number of cores. So the speaker cable square = 3.14* (copper wire size / 2) ² * the number of unilateral cores of the audio cable. For example, 100-core audio cable, copper wire diameter is 0.1mm. Then its square = 3.14* (0.1/2) ² *100≈0.8mm². That is, the cross-section thickness of the 100-core speaker wire is 0.8mm². In the audio system, the wire, wire and wire outer diameter should be consistent with the inner aperture of the connector, the wire should be soft and rigid, both soft and strong, good mechanical properties, tensile resistance, anti-trauma, good insulation performance. In addition to the strength of the thread, the outer skin of the line is also resistant to acids and alkalis. Someone buys a high-end audio, but in order to save money, they choose a low-end audio cable, which is no different from driving a sports car to a gas station and adding the cheapest gasoline – saving money on the surface, but actually wasting a sports car.
Precautions for the use of the audio cable
(1) Under the premise of sufficient use, the audio cable should be as short as possible, and the excess length will increase the signal loss and reduce the sound quality and picture quality;
(2) To keep the sound line straight as possible, bending or winding will block the signal transmission, which will damage the sound quality and picture quality;
(3) The connection between the audio line and the audio parts must be tightened, and poor contact will produce noise and cause blurry picture;
(4) The size of the speaker cable should be moderate. The sound power is larger, and a thicker speaker cable can be selected, and vice versa. The size of the speaker cable does not match the size of the audio power, which will damage the sound quality, and the serious audio parts will be burned;
(5) After the sound cable is used for a period of time, because the terminals at both ends are exposed in the air for a long time, it may be oxidized, resulting in damage to the transmission of the signal. If this occurs, a new audio cable should be replaced in time;
(6) When the same function of the audio has a variety of choices, the one with the relatively ideal effect should be preferred. For example, when there is a single-line split and a two-line split connection function between the amplifier and the speaker, the two-line split sound connection should first be selected to connect the speaker line and choose the best use function to ensure that the sound plays the ideal sound effect and picture effect.