Joe - you gave me a good chuckle and a memory of the early days - when we wired five for a performance at church.
All went smooth....nary a pop nor a crackle duirng extended rehersal performances.. Beautiful.
We did not atticipate the conditions of the first production on Good Friday. A three day weekend for many and outside drama in the community. EVERY Fire Deot "meat wagon" running the streets cut into our system within a half miles, Shortly before the Golgotha scene we were able to get hand-helds into the hands of the notables.
I concure with low battery (charge and replace early.) An alligator clip snapped on the antennae with a 3 foot or 5 foot soldered on copper wire may also give results you can play with the direction and add a loop.
Vestments and clothing can rustle.
Jewlery and chains can damp the mic.
OVER the head and onto the forehead work better than behind the ear and forward.Sincerely,
Gargoyle
Four directional omni work well for a chorus of 100