I use it when it's 12V, it's probably most popular barrel plug voltage and also used in a lot of audio devices (aside from guitar pedals which have 9V with reversed voltage... fuck that)
-9v is semi-tolerable for legacy reasons, what's really bad is center-positive 5v on what looks like a 1.3mm or so plug, as found in a cheap wireless DMX system. Still beats wired DMX though.
eternityforest|2 years ago