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How do I mike a stage? How do I combine two mics into one input?

We have a show relay system in our village hall along with an induction loop. The microphone is situated above the stage, but it does not pick up all the sounds - usually only from those speaking directly under the mic. It is turned up all the way but does not feed back. I am not sure if we have the correct type of mic and would like some advice as to what sort we should actually be using to maximize the pickup.
 
Also, is there an adaptor available that would allow us to connect two mics to the same socket?
Liz Stevens
 
Reply: It sounds like the microphone needs to be closer to the people speaking. Ideally, you'd use a tiny clip-on mic on each person. If the people move around a lot, as in a drama or musical, the best arrangement is to use wireless clip-on mics. That is expensive, because each wireless mic transmitter and receiver costs $150 to $700. You need one transmitter and one receiver per person. Audio-Technica,. Nady, Samson, Sennheiser, Shure, and AKG (among others) make wireless clip-on (lavalier) mics.
 
Crown makes the PCC-160 microphone, which sits on the stage floor and picks up actors well. It requires phantom power from your mixer. Here is a link to the PCC-160 data sheet:
 
You can find a dealer by searching for Crown PCC-160 in www.froogle.com.
 
To reduce feedback, you need to use a graphic equalizer between your mixer output and power -amplifier input . A document describing how to set the graphic equalzier is at the link below. The document takes a while to load into your browser.
 
Below is a schematic of a mic-combiner circuit that connects two mics to the same socket. You, or a friend who is knowledgeable in electronics, or a music-store technician, can build it from three XLR connectors and four resistors.
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