i don't see the em-63 on their site, is it similar to the em-68?
the 68 says it can be configured as a 2-wire or 3-wire mic. is this done by wiring two of the terminals to ground?
Em68 has three wires (two on the PC board, one to the case). You can run either two wire or three.
I don't know the color of the wires though.
If it is like AT853, then there are three: shield, yellow and red.
There are three possibilities:
- short yellow to shield, red to miniplug: this is two wire
- put a 4.7k resistor between yellow and shiedl, red to miniplug: this is two wire "4.7k mod"
- keep three wires, red, yellow, shield > 3 wire battery box
Internally all AT853 mics use the third option, with a 5.1k resistor inside for a load. So, the 4.7k mod is OK. Disadvantage is it loses pprox 6-12dB gain, but to avoid distortion it is well worth it IMO.
Richard