WOPL Sniffer
Veteran and General Yakker
If you can keep your fingers out of the wall outlets, you can keep your fingers out of the outputs. Been doing them for years and I don't put covers on them. Keep the children away from the stereo and keep YOUR hands out of the back while energized. It's pretty easy to NOT GET ZAPPED if you pay attention. Kind of like poking around in the engine compartment with the car running. You better know what the hell you are doing.