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Can I use +48v Phantom supply with dynamic microphones connected to the mic XLR inputs?

April 26, 2017connected Dynamic inputs mic microphones Phantom supply XLR

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Can I use +48v Phantom supply with dynamic microphones connected to the mic XLR inputs?

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It is possible to use BALANCED dynamic microphones when the +48v phantom is on. The microphone coil ‘floats’ up with the voltage preventing damage to the microphone by ensuring ‘zero’ volts across the microphone coil. If the dynamic microphone is configured UNBALANCED (where pins 1 & 3 are connected together), then the dynamic microphone will be damaged. This is because one side of the microphone coil is connected to ground, with the other side connected to +48v. Thus, +48v will be across the microphone coil causing it to burn out. Always ensure the Mic lead is balanced when using +48v phantom power.