Pawn shops are filled with audio gear from desperate, broke artists. XLR is a pretty standard in the audio community. I even have a 2.5mm-to-XLR adapter on my d

Pawn shops are filled with audio gear from desperate, broke artists. XLR is a pretty standard in the audio community. I even have a 2.5mm-to-XLR adapter on my desk. This pawn shop must be really far from any place with performance venues. Now on the other hand I had some old Bang and Olufsen speakers that used proprietary everything. Even the audio input was some kind of balanced 24V signaling 5-pin DIN connectors. Basically you could not plug into anything except another B&O.