Originally Posted by glock22ed
This unit has one set of speaker outputs. What is up with that?
Just means it was being utilized for subwoofer(s). There's usually signals for left and right, but usually just one subwoofer output on an aftermarket headunit. It has to do with bass frequencies being non-directional, and not needing a left and right sub - basically, you just need one unless you're trying to increase volume by having more than one woofer (of the same size).