this is what I have
it mounts just behind my rearview mirror. I like it, so I'm not getting a new one.
my headunit has 6 rca outs, 2 aux-in, and 2 aux-out. 2 rca's going to front, 2 to rear, the other two are either stereo subwoofer, or mono sub and mono center. the only audio-out wires from the HU are for front and rear.