A. J. deLange |
September 17th, 2006 09:47 AM |
Phantom power is usually supplied at a reasonably high voltage - more than in required to run the preamplifier in the microphone. If only phantom power is present then circuitry is required to derive the lower voltage for the pre-amp. If a battery is also present then the high phantom voltage can be used to bias the capsule while the lower battery voltage can be used to operate the preamp. It's a pretty shaky hypothesis but about the best I can come up with.
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