What’s a Line Driver?

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Line drivers are amplifiers that improve the clarity and strength of analog and digital signals. A line drive works by driving or amplifying input to the transmission line to a much higher point than normal. As a result, there is less signal degradation as it travels through long stretches of cable to reach its destination point.

There are many other benefits that come with using an audio line driver. One has to do with minimizing noise along the transmission line. This effectively helps improve the communication flow between the point of origin and the termination point, as it prevents background noise from making it difficult to hear the transmission itself.

Another benefit of using a line driver has to do with the cleanliness of the transmission itself. In addition to filtering out background noise, amplifying the original input also allows you to adjust the clarity of the signal. In this way it is possible to amplify slightly weak voices, making the intelligibility of the signal much easier once it has reached its destination. This is true even if the termination point is worldwide from the point of origin.

While traditionally associated with telephone services, the line driver has continued to be an essential component today when many communication signals are carried over the Internet. Both landline and mobile phone providers often use what’s called Voice over Internet Protocol, or VoIP, to carry signals back and forth during a phone call. The drivers are located at the switches that receive the online portion of the signal, translate it into forms that the local telephone switches can understand, and deliver the transmission to the end user. Using drivers to modulate the Internet-based portion of the signal helps maintain transmission integrity in the same way that the signal is preserved when transmitted over copper or other wires.

Not all forms of the line driver are used on communications equipment. Drivers of this type are also found on musical equipment, such as guitar amplifiers. Once again, the function of the driver is to prevent background noise which could distort the sharpness of the notes being played. When used to modulate sound output, the line driver on an amplifier helps keep feedback to a minimum, making it much easier for listeners to hear music the way the player intended.

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