Low level audio output (usually in the form of a RCA connection) which varies in strength with the volume or level of the source component. For instance, a television with a variable audio output may be connected to an amplifier and the amplifier to speakers. As the volume on the television is turned up the audio output would increase thus increasing the sound level produced by the amplifier and speakers. Conversely, turning down the volume on the television would turn down the volume coming from the speakers. This feature is useful if you would like to adjust the volume of your television sound as played through your main speakers (your audio system) through the television itself. If you would rather adjust the volume using the audio system’s preamplifier or receiver, a variable audio output is of less use.