On the back of stereos, What is the "Bus Audio" In/Out?

Question

I bought myself a sony stereo. On the back of it there are Front audio, back audio, and Bus audio.

Is bus audio where I plug in my subwoofers?

What is Bus audio?

Answer 1

Bus audio is typically where component type peices attach.

On some factory stereos, the cars come standard with amplifiers or stackers, which are controlled through the head deck.

For instance, a CD Stacker would be plugged into a BUS Audio to allow it to be controlled from the head deck

Answer 2

bus audio is  audio from the data buss device

cd changer,xm radio it is only audio input and you need the sony device for it to work

Answer 3

u need an amp for subs,if u dont have an amp to power em,u will blow the voice coils in it.