No, seriously, I have! Watch the video and you can construct one too! You’ll need an XLR cable, a transformer (like a 600 ohm telephone transformer with three windings), some little diodes like stompboxes use for clipping, and a teeny capacitor. Two of everything, for stereo. You’ll want a soldering iron (if needed, I can make a How To Solder video) and either a multimeter, or in a pinch, guitar cables and some kind of amp (as shown in the video). With these, you too can build what I’ve built.