Hey everyone,

I have a base audio in my GLC which is four door speakers and a woofer on the passenger side, all driven by the head unit. To my understanding the unit has four channels, so I wonder how is the woofer connected? I know that all four speakers reside on their own channels otherwise balance and fader wouldn't work. One solution would be to use two channels in bridge mode, but that would make the channels used in both bridge and single mode. I'm not sure if that's even possible.
I was thinking to add one of those plug and play amplifiers to improve the sound quality, but the woofer wiring puzzles me.

Thanks