All Information on this site is for entertainment purposes only. Always consult a professional before making any alterations, modifications or adjustments to your vehicle or equipment.

Line Drivers/Crossovers

A line driver is an electronic amplifier circuit designed for driving a load such as a transmission line. The amplifier’s output impedance may be matched to the characteristic impedance of the transmission line.

***PLEASE NOTE*** All information on this site is for entertainment processes.  Any guidelines, tips or recommendations are considered general knowledge and we strongly encourage you to consult with a professional before installing, adjusting, or altering a car audio system.

In analog audio, a line driver is typically used to drive line-level analog signal outputs, for example to connect a stereo music player to an amplified speaker system.

When you have long wire runs to the back of a large vehicle, your signal strength may weaken before it reaches the amplifier or be clouded by noise interference. By using a line driver/crossover, you can rise the signal for better sound quality, and a noise free signal.

A standard head unit, even an after market can still produce a weak signal. Signal loss can be caused by multiple factors including weak head unit output, using mutliple devices and other factors.  By placing the line driver between your head unit and amplifier, you can increase the signal as well as adjust accordingly.

Remember, boosting the signal is pointless if the equipment it is being received by can not handle that input.  Be sure to research all of your equipment capabilities to ensure optimal system function.


This article uses material from the Wikipedia article Line driver. which is released under the Creative Commons Attribution-ShareAlike 3.0 Unported License (view authors).