How is the Shure MX391 microphone wired for the Intel Team Station?
MX391 Variation for Intel TeamStation
1. Does not include in-line preamp
2. Switchcraft TA4F connector replaced by Switchcraft TA3F. The TA3F may be purchased at www.mouser.com
3. TA3F wired as follows: Pin 1 - shield; pin 2 - bias (red wire); pin 3 - audio (black wire)
4. Input on Intel TeamStation provides +5V bias to operate MX391 FET.