Data System Sound line amplifier

When connecting an external playback device such as a DVD player to the external input of a genuine navigation system or a commercial navigation system, the volume tends to be lower than the sound (CD, radio, etc.) played by the navigation itself. When using these by switching, it is necessary to adjust the volume on the navigation side each time.

The sound line amplifier adjusts the level of the input audio from the external playback device and outputs it, so there is no need to adjust the volume each time you switch between various playback devices.

For more details please go through the below link...
Sound line amplifier