What kind/type of microphone I need to use to be able to wire a choir of 20 people. I am aware I would need to use a couple of microphones but which one would be precisely the best for the job.
Assuming the microphones are for a public address system, and that the mixing console has phantom power, I recommend:
One SM81 microphone mounted with an A53M shock mount on a S15A mic stand
One MX202C/B hanging choir microphone which is suspended by it's cable.
For details on choir miking, please go to: Educational Articles - Online booklets and bulletins
For a complete listing of microphones that we recommend for choir: Selection Guides