Audio specifically refers to a set of audio systems that emit sounds of electrical equipment combinations.The development history of audio technology can be divided into four stages: electronic tube, transistor, integrated circuit, and field effect tube.
How to link audio
The meaning of equipment connection
The connection between audio equipment at all levels is more important.Improper connection will not only affect the renewal effect of the equipment, but even damage the equipment.
Basic requirements of connection
1. Matching signal level:
When connecting audio equipment, you must pay attention to the differences in input and output signal levels between equipment.If the level of the previous equipment input signal is too large, nonlinear distortion will be generated, otherwise it will land the signal -to -noise ratio of the replacement system, and it cannot even promote the amplifier of the next level.The level of the inter -bonus should not be too large.If the signal level is not adapted in actual use, the input signal level must be reduced through the attenuated circuit, or the level of the input signal is improved by amplifying the circuit.For a general dynamic microphone output voltage, it is needed to have a first -stage amplifier circuit to amplify the signal and send it to the front large circuit.For recording seats, CD singers and LD machines, because the level of its output signal reaches 0.755 ~ 1V, it can be directly sent to the front amplifier.
2. The matching of impedance:
In HI-Fi audio equipment, such as the output impedance of the transistor power amplifier is low impedance, and the output impedance of the electronic tube power amplifier and other equipment is high impedance.If they do not match the impedance with the speaker, the output power distribution of the amplifier will be unevenly distributed, or the transient characteristics of the ambassador speakers will be poor due to the damping.
There are two types of impedance matching connections: balance and imbalance.The so -called equilibrium refers to the impedance of the two -core shield line of the transmission signal.The so -called imbalance refers to one of the two -core shielding line.When the balance output is connected to the input input, it must be matched by matching the transformer.
connection method
In HI-Fi audio equipment, the connection of the equipment is done by various connectors, and the commonly used connection is the following.Sound p14.
1. Two -core plug: It is mainly used to transmit signals between various equipment and input plugs as a microphone input signal.It is divided into three types: 2.5mm, 3.5mm, and 6.5mm according to its diameter.
2. Lotus plug: It is mainly used for input and output plugs for lines between audio equipment and video equipment.
3. Caval plug (XLR): It is mainly used for the connection between the microphone and the amplifier.
4. Five -core socket (DIN): It is mainly used for the connection between the card recording seat and the amplifier. It can concentrate the stereo input and output signal on a socket.
5. RCA plug: RCA plug is mainly used for transmission of video signals in the equipment.
6.F, M plug: It is mainly used for input and output of radio frequency signals in audiovisual equipment.
How to use audio
Stay away from your phone
Out of the circuit to protect the speaker, although your desktop audio can be placed arbitrarily, it keeps a distance from mobile phone, rope phone, TV, refrigerator, microwave oven and other items, and it is best to be farther away from the computer case.The placement of different electrical appliances "well water does not commit river water" can keep the circuit of each electrical appliance the best due to mutual disruption.
The importance of the sound source
No matter how good the audio is, there is no good music.Although compressed formats such as MP3, WMA, Atrac3plus, etc., after all, this is a damaged compression format. The dish capacity of this type of music may be very large, but many elements in the sound are abandoned when they are compressed.Because desktop audio is generally used in small spaces such as bedrooms and kitchens to create a music background, we recommend that consumers who use desktop audio can try to use more listening classical music, light music, or listening frequency regulating radios.EssenceNon -live recording popular music, etc., can use compression formats for consumers who do not have high requirements for reducing quality.
Taboo of audio use
With the popularization of film and television audio equipment, more and more people are interested in the audiovisual field.As a enthusiast, it is important to have a set of high -end equipment, but it is also important to use these equipment correctly.In general audio enthusiasts, some misunderstandings in use should be avoided.
The first is to put the equipment into the cabinet.Some people put the equipment into the custom cabinet out of the decoration and protection. This will cause the sound to make the sound unnatural due to the inside the cabinets space. The power amplifier and other equipment is easy to excess heat and aging because there is no sufficient circulation air.If the speaker is put into the wall, the sound effect will be stiff.
The second is stacking equipment.Many people love to place the machine, amplifier, mission, digital simulation converter and other machines overlap, which will cause mutual interference, especially the radium camera and power amplifier are seriously interference, which will make the sound hard and produce a sense of depression.The correct way is to put the equipment on the audio rack designed by the factory.The third is that the power plug is positive and negative.The good system of the positive and negative treatment of the power plug has a clear level of the sound and smoothness;
Fourth, the wiring is not firm and unclean.If the sound color is dry, one of the reasons may be poor contact, such as the plug is not solid, the contact surface is oxidized, the dust or oil is stained, so it should be checked frequently to keep the contact surface clean.
Fifth, use cloud stones or glass to carry equipment.Low density of cloud stone and high resonance will affect the sound effect.The glass density is higher than the cloud stone, but it is not thick and resonant.Can be used for granite or hemp stone, especially hemp stone, the highest density, and the carrier is ideal, but the thickness is more than 3 cm.
Sixth, the placement of the speaker is "adapt to local conditions."Some people move the speakers to the furniture because they have other furniture in the room.The correct decision to listen to the distance first, and then put the speaker in the seat between the seat and the opposite wall. The spacing of the speaker is 0.7 times the distance between the listener and the speaker.Essence
Seventh, improper wiring processing.When processing the wiring, you must not tie the power cord with the signal line, because the AC power will affect the signal; the signal line or the speaker cable cannot be knotted, otherwise it will affect the sound; the signal line or the speaker cable can be shortened.Many signal cables are directed, dont make mistakes.
Eighth is to do the sound effect of the room.In addition to sound insulation and sound insulation, more importantly is the treatment of sound wave reflection and refraction. This needs to consider the volume, size, solid level, materials of materials, etc.Read the best results.
Nine are blind imitation.Do not start from actual, blindly imitate others.For example, people use long signal cables and short -to -line wires. This is because the front and rear levels and laser machines are balanced, and your equipment is not balanced. It is also difficult to achieve the same effect.
Ten is self -deceiving.For example, the effect of playing a certain type of concert is very effective, and it is not ideal to play another type of music. This shows that the system has not yet reached the ideal level. It needs to learn more, listen, and observe more, so as to improve.

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