DWH301A/301B/301C:
1) The microphone uses a low-noise class A FET circuitry,
2) Low frequency is deep and melodious,
3) High frequency is clean.
4) DWA301A is a cardioid pattern condenser microphone with an internal low frequency
roll-off switch.
5) DWH301B comes with two optional switches below the head grill: the low frequency
attenuation
