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1. Basic requirements for equipment connection:
(1) Matching of signal levels: When connecting audio equipment, be sure to pay attention to the difference in input and output signal levels between devices. If the level of the input signal of the preamplifier is too large, nonlinear distortion will occur, otherwise the signal-to-noise ratio of the Reed's playback system will be lowered, and even the amplifier of the next-level equipment will not be pushed. Therefore, attention should be paid to the equipment when mating. The level between them should not be too large. If the signal level is not adapted in actual use, the input signal level must be lowered by the attenuation circuit, or the level of the input signal can be raised by the amplification circuit. For a typical moving coil microphone output voltage is a few millivolts, it is necessary to provide a first-stage amplifier circuit to amplify the signal and send it to the preamplifier circuit. For the recording stand, cd player and ld machine, since the output signal level is 0.755~1v or more, it can be directly sent to the preamplifier.
(2) Impedance matching: In hi-fi audio equipment, for example, the output impedance of a transistor power amplifier is low impedance, and the output impedance of a device such as a tube power amplifier is high impedance. If they do not match the impedance when connected to the speaker, the output power of the amplifier will be unevenly distributed, or the transient characteristics of the speaker will be deteriorated due to excessive damping.
Impedance matching connections are generally available in both balanced and unbalanced versions. The so-called balanced type means that the impedance of the two core shielded lines transmitting the signal is equal to the ground. The so-called unbalanced type refers to one of the two core shielded wires, one of which is grounded. When the balanced output is connected to the unbalanced input, it must be matched by adding a matching transformer.
2. Connection method of the connector: In the hi-fi audio equipment, the connection of the equipment is completed by various connectors, and the commonly used connectors have the following types, the sound p14.
(1) Two-pin plug: It is mainly used to transmit signals between various devices and as an input plug for the microphone input signal. According to its diameter, it is divided into 2.5mm, 3.5mm and 6.5mm.
(2) Lotus plug: It is mainly used for input and output plugs for wiring between audio equipment and video equipment.
(3) cassette plug (xlr): mainly used for the connection between the microphone and the amplifier.
(4) Five-pin socket (din): It is mainly used for the connection between the cassette deck and the amplifier. It can concentrate the stereo input and output signals on one socket.
(5) rca plug: rca plug is mainly used for transmission of video signals in equipment.
(6) f, m plug: It is mainly used for input and output of radio frequency signals in audio-visual equipment.
The mating between the audio equipment levels is more important. Improper connection will not only affect the playback performance of the equipment, but will even damage the equipment.
1. Basic requirements for equipment connection:
(1) Matching of signal levels: When connecting audio equipment, be sure to pay attention to the difference in input and output signal levels between devices. If the level of the input signal of the preamplifier is too large, nonlinear distortion will occur, otherwise the signal-to-noise ratio of the Reed's playback system will be lowered, and even the amplifier of the next-level equipment will not be pushed. Therefore, attention should be paid to the equipment when mating. The level between them should not be too large. If the signal level is not adapted in actual use, the input signal level must be lowered by the attenuation circuit, or the level of the input signal can be raised by the amplification circuit. For a typical moving coil microphone output voltage is a few millivolts, it is necessary to provide a first-stage amplifier circuit to amplify the signal and send it to the preamplifier circuit. For the recording stand, cd player and ld machine, since the output signal level is 0.755~1v or more, it can be directly sent to the preamplifier.
(2) Impedance matching: In hi-fi audio equipment, for example, the output impedance of a transistor power amplifier is low impedance, and the output impedance of a device such as a tube power amplifier is high impedance. If they do not match the impedance when connected to the speaker, the output power of the amplifier will be unevenly distributed, or the transient characteristics of the speaker will be deteriorated due to excessive damping.
Impedance matching connections are generally available in both balanced and unbalanced versions. The so-called balanced type means that the impedance of the two core shielded lines transmitting the signal is equal to the ground. The so-called unbalanced type refers to one of the two core shielded wires, one of which is grounded. When the balanced output is connected to the unbalanced input, it must be matched by adding a matching transformer.
2. Connection method of the connector: In the hi-fi audio equipment, the connection of the equipment is completed by various connectors, and the commonly used connectors have the following types, the sound p14.
(1) Two-pin plug: It is mainly used to transmit signals between various devices and as an input plug for the microphone input signal. According to its diameter, it is divided into 2.5mm, 3.5mm and 6.5mm.
(2) Lotus plug: It is mainly used for input and output plugs for wiring between audio equipment and video equipment.
(3) cassette plug (xlr): mainly used for the connection between the microphone and the amplifier.
(4) Five-pin socket (din): It is mainly used for the connection between the cassette deck and the amplifier. It can concentrate the stereo input and output signals on one socket.
(5) rca plug: rca plug is mainly used for transmission of video signals in equipment.
(6) f, m plug: It is mainly used for input and output of radio frequency signals in audio-visual equipment.
The mating between the audio equipment levels is more important. Improper connection will not only affect the playback performance of the equipment, but will even damage the equipment.
1. Basic requirements for equipment connection:
(1) Matching of signal levels: When connecting audio equipment, be sure to pay attention to the difference in input and output signal levels between devices. If the level of the input signal of the preamplifier is too large, nonlinear distortion will occur, otherwise the signal-to-noise ratio of the Reed's playback system will be lowered, and even the amplifier of the next-level equipment will not be pushed. Therefore, attention should be paid to the equipment when mating. The level between them should not be too large. If the signal level is not adapted in actual use, the input signal level must be lowered by the attenuation circuit, or the level of the input signal can be raised by the amplification circuit. For a typical moving coil microphone output voltage is a few millivolts, it is necessary to provide a first-stage amplifier circuit to amplify the signal and send it to the preamplifier circuit. For the recording stand, cd player and ld machine, since the output signal level is 0.755~1v or more, it can be directly sent to the preamplifier.
(2) Impedance matching: In hi-fi audio equipment, for example, the output impedance of a transistor power amplifier is low impedance, and the output impedance of a device such as a tube power amplifier is high impedance. If they do not match the impedance when connected to the speaker, the output power of the amplifier will be unevenly distributed, or the transient characteristics of the speaker will be deteriorated due to excessive damping.
Impedance matching connections are generally available in both balanced and unbalanced versions. The so-called balanced type means that the impedance of the two core shielded lines transmitting the signal is equal to the ground. The so-called unbalanced type refers to one of the two core shielded wires, one of which is grounded. When the balanced output is connected to the unbalanced input, it must be matched by adding a matching transformer.
2. Connection method of the connector: In the hi-fi audio equipment, the connection of the equipment is completed by various connectors, and the commonly used connectors have the following types, the sound p14.
(1) Two-pin plug: It is mainly used to transmit signals between various devices and as an input plug for the microphone input signal. According to its diameter, it is divided into 2.5mm, 3.5mm and 6.5mm.
(2) Lotus plug: It is mainly used for input and output plugs for wiring between audio equipment and video equipment.
(3) cassette plug (xlr): mainly used for the connection between the microphone and the amplifier.
(4) Five-pin socket (din): It is mainly used for the connection between the cassette deck and the amplifier. It can concentrate the stereo input and output signals on one socket.
(5) rca plug: rca plug is mainly used for transmission of video signals in equipment.
(6) f, m plug: It is mainly used for input and output of radio frequency signals in audio-visual equipment.
Hi-fi audio equipment need to pay attention to the problem when connecting?
The mating between the audio equipment levels is more important. Improper connection will not only affect the playback performance of the equipment, but will even damage the equipment.