Jump to content

What is audio "common" wire?


Recommended Posts

Does anyone know what the "audio common" wire is (see attached)? I understand the left and right channels, and ground appears to be just connected to the bare metal shield in the audio cable, so I don't think common = ground. Maybe it's a center channel? I'm basically trying to hook up the audio aux input in the center console of a 2018 Sierra to an aftermarket headunit. When I connect just left, right, and ground, I hear both channels, but it seems quieter and less has less bass than if I plugged directly into the aux port of the headunit.

2018 Connector.pdf 2018 Radio.pdf

Link to comment
Share on other sites

The audio common is the inverted signal on a balanced input.Unlike unbalanced inputs where there is basically a shield and a signal, a balanced input has a hot signal and also an inverted signal that is completely out of phase with the hot signal. The inverted signal is also known as the audio common.

Link to comment
Share on other sites

11 hours ago, JH1973 said:

The audio common is the inverted signal on a balanced input.Unlike unbalanced inputs where there is basically a shield and a signal, a balanced input has a hot signal and also an inverted signal that is completely out of phase with the hot signal. The inverted signal is also known as the audio common.

Thank you! Do you know how I would hook this up to a standard TRS 3.5mm jack?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.