The Impedance and Balance of Recording

- Sep 25, 2018-

Impedance is also called resistance, which is the resistance of the electronic device itself to the AC power supply. In other words, all electronic circuits have an inherent resistance to the natural flow of electricity, just like the resistance to wind when running. A low impedance audio signal is stronger than a high impedance signal because it suffers little resistance. In practical applications, the impedance of various equipment should be consistent. If an output is connected from a high impedance input to a low impedance input, problems can occur. Because the current delivered is too large. For example, a low-impedance microphone should be input to the input terminal of a low-impedance mixer. If you need to connect two devices with different impedances, you should use a matching transformer and change the impedance of one of the devices to match the two. Impedance type, high impedance: A circuit with an impedance of 1,000 ohms or more. Low impedance: A circuit with an impedance of 600 ohms or less.

Balance and imbalance as a general rule, the input and output of an audio device are either balanced or unbalanced. The balance cable is shielded by an auxiliary line to prevent noise in the resistor due to the length of the line. The general sophomore and lotus cables are unbalanced; the cassette or stereo large three-core cable is balanced (three connectors, not two). Each piece of equipment has a balanced or unbalanced input and output port. If you connect the balanced output to the balanced input, you should use a balanced cable. The unbalanced input and output are connected to the unbalanced input and output, and an unbalanced cable can be used; if the balanced cable is used, it will not cause any damage, but the auxiliary line cannot be used, and there is no benefit.

 

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