Posted by Wayne Parham [ 70.234.106.31 ] on January 23, 2008 at 10:06:07:
In Reply to: Neutrik Microphone posted by Ed Form on January 21, 2008 at 20:04:19:
That's a good question, and I think you might want to contact NTI and ask them. I would guess it would probably work, but it may affect its performance. That would bring your measurements into question, which makes it sort of missing the point to even use it. So I'd call NTI.
There is one other thing you might consider. The phantom supply is provided through series resistors on pins 2 & 3, usually 1kΩ to 10KΩ each pin. You could put shunt resistors across each pin from 2-1 and from 3-1 to reduce the phantom voltage. Be sure they are perfectly matched, equal value resistors. You could put them on a microphone cord or on a little pigtail adapter. I wouldn't go smaller than 1KΩ to reduce the effect of line impedance but I don't think you'll have to go that low. If the phantom supply source impedance is 4.7KΩ. then a 4.7KΩ resistor in shunt will cut phantom voltage in half. You can always connect the resistors across pins 1-3 and 2-3 and measure the voltage across those pins to make sure they're between 10v and 30v before connecting the microphone.
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