While waiting to get my car, I am trying to plan in advance what the installation options are.
I am now wondering whether the installed stereo system can be used with the empeg. My plans were to have the whole installation redone, but I am now realizing that I may have to only replace the head unit and speakers.

Now, I know these data concerning the factory stereo installation (I am translating from Italian, so I hope this makes sense):

• Conenction to CAN-Bus Network
• Overall Power: 140 Watt
• 8 Speakers with Centerspeaker and Reflex Speaker for bases
  

So my questions are:

What is a Can-Bus Network, and could I benefit from it with an Empeg?

The overall power and the nr of speakers makes me think there must be an amplifier somewhere. Waht do you think? If so, Maybe I ca use it with my empeg.

What is a "centerspeaker"?
What is a "reflex speaker"? Is this replacing a subwoofer?

I'm feeling very ignorant

Thank you all in advance