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<br> <br> balanced connection is a so-called balanced connection transmits a pair of balanced signal connection method using two signal lines, two signal lines are the same as receiving an interference magnitude and opposite in phase, the interference will be finally canceled. Due to the low frequency range of the audio, it is susceptible to interference in the case of long-distance transmission. Therefore, the balanced connection method is an anti-jamming connection method and is most common in audio connections of professional devices. Two-core shielded cables are also used as the audio cables in household appliances. However, it transmits the left and right channels, which are two signals and do not belong to the balanced connection method.
Unbalanced connection
The unbalanced connection method is a connection method for transmitting signals using only one signal line. Since this connection method is susceptible to interference, it is generally used only in home appliances or in some cases where the requirements are relatively low. The specific connection uses the XLR connector as an example:
1. Balanced connection method: 1 foot connection shielding, 2 foot connection (also called hot end), 3 foot connection-end (also called cold end);
2. Unbalanced connection: 1 foot and 3 feet are connected to shield, 2 feet are connected (signal ends). The choice of connection method is generally based on the specific requirements of the equipment on the interface, you can use the balanced connection as much as possible to use balanced connection method, be sure to first look at the instructions on the panel, it is best to read the instructions on the instructions and Claim. In some cases, it may also be encountered that one end of the device interface is a balanced interface, and the other end of the device is an unbalanced interface. In a less demanding situation, only a balanced connection must be used at the balanced end, and unbalanced use of an unbalanced connection. Law, pay attention to each foot on it. In demanding situations, conversion circuits must be used to shift the balance to unbalance or to balance the imbalance.
Audio cable, audio cable for short, used to spread the sound of the line. It consists of two parts: audio cable and connector. The audio cable is generally a double-core shielded cable. The connector is commonly known as RCA (commonly known as the lotus head audio cable), XLR (commonly known as Cannon head audio cable), and TRSJACKS (commonly known as the plug-in pen). .