Dynamic microphones do not require phantom power. However, there are some very low output dynamic microphones, such as the Shure SM7B (which has an output level is -69dBV), which require a preamp to boost the signal. If the preamp you connect the microphone to is active, you will then need to turn the phantom power on.

Is phantom power bad for dynamic mics?

Phantom power is a dc voltage (11 – 48 volts) that powers the preamplifier of a condenser microphone. ... A balanced dynamic microphone is not affected by phantom power; however, an unbalanced dynamic microphone will be affected. Although the microphone will probably not be damaged, it will not work properly.

Do dynamic mics need power?

Dynamic microphones do not need a power supply (partially true) The vast majority of dynamic microphones can manage without power but there are some exceptions. Basically, all condenser microphones need some kind of power supply. ... Active dynamic microphones need a power supply as well.