Back into geek mode on the Magnatone guitar my friend Dan owns! The under-the-hood stuff is here to show the very clean wiring and high parts quality. The dots on the small slide switch lets you select one (mono) output or both for “stereo”. Each output could feed a separate amp in stereo mode, with all the options that makes possible: tone and volume settings, amp type and placement, and so on. Stereo mode disables the 3-way Gibson style selector so that each output is controlled by its own set of volume and tone controls. There isn’t a lot of finger room to get to the controls, which would make it a little tricky to adjust on the fly. But hey, we guitarists can get used to anything, right?