Microphone shocking

[Marvin]

Our singer is saying that she's getting an electrical sensation when holding the microphone. 

 

Someone suggested that the phantom power might be on on the mixer. However,  I can't remember seeing the phantom power light on on the mixer and the guitarist said he checked it was off.

 

The sensation is all the time. She's tried a different mic, changed the cable,  stood a a rubber floor mat, not stood on the mat. Still the same.

 

The phantom power seemed the obvious culprit but apparently not (unless there's a fault in the desk).

 

Any ideas?

 

Ta.

 

Edited 3 hours ago by Marvin

[Chienmortbb]

This is odd. There is no reason that the singer should get a shock from a mic unless there is a fault on the mixer and that would be unusual. You need to measure the voltage between the mic grille and earth. It should be very small, millivolts ideally.  

[Bill Fitzmaurice]

This was common in the days before 3 wire mains cables were used, which insure that all devices are properly grounded. But it usually presented a problem only if one was holding a guitar and touching the mic. Just holding a mic should never present a problem. Even if the mic body is receiving current she would have to be a path to ground to feel anything. Have you had someone else hold the mic to see if they feel it?