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Audio equipment at all levels of matching between the

In Electronic Infomation Category: A | on April 14,2011

Audio equipment matching between levels is more important. If properly connected equipment will not only affect the playback effect, or even damage the equipment. Here are given on the matching between the levels of audio equipments view.

A, the basic requirements of connected devices

(1) signal level of the match: When connecting audio equipment, the equipment must pay attention to between the input and MC34072D datasheet and output signal level differences. If the first-class equipment, the input signal level is too large, will produce nonlinear distortion, otherwise it will falls replay system signal to noise ratio, and MC34072D price and even equipment can not be driven by an amplifier, so the matching equipment to the attention of difference between the level should not be too large. If the actual signal level does not appear fit, you must enter through the attenuation circuit to reduce the signal level, or by amplifier input signal level to increase. For the average output voltage of moving coil microphone a few mV, requiring an amplifier with the amplified signal to be sent to pre-amplifier circuit. For the tape deck, CD players and MC34072D suppliers and LD, as the output signal level of 0.755 ~ 1V or more, it can be directly fed into the preamplifier.

(2) impedance matching: The Hi-Fi audio equipment, such as the transistor power amplifier output impedance is low impedance, and equipment such as tube amplifier output impedance to high impedance. If they are connected with the speaker impedance mismatch will lead to uneven distribution of the output power amplifier, or damping off due to the transient characteristics of the speaker, Ambassador worse. Impedance matching of the connection are generally balanced and unbalanced two. The so-called balanced transmission signal is a two-core shielded cable equal impedance to ground. Is the so-called unbalanced in the two-core shielded cable, including a ground. When the balanced and unbalanced input connected to the output, you must match by adding matching transformer.

B, connector connection method

In Hi-Fi audio equipment, the equipment, connection is accomplished by a variety of connectors, commonly used connectors are the following.

(1) two-pin plug: mainly used to transmit signals between various devices as well as the microphone input signal input plug. According to their diameter into a 2.5mm, 3.5mm, 6.5mm three.

(2) Lotus * Plug: mainly used in audio equipment and video equipment for the line between the input and output plugs.

(3) XLR plugs (XLR): mainly used for the connection between the microphone and amplifier.

(4) five-pin socket (DIN): mainly used in cassette decks and the connection between the amplifier, which can be stereo input and output signals in one outlet.

(5) RCA plugs: RCA plugs are mainly used in video signal transmission equipment.

(6) F, M plug: it is mainly used for audio-visual equipment in the RF signal input and output.

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