Audix OM2 TRIO 3-Pack Dynamic Vocal Microphones Vocal & instrument mic, full, clear sound with slight bass proximity, for small to mid-size PA systems. Designed, assembled and tested by Audix in the USA, the OM2 is a dynamic vocal microphone used for a wide variety of live and studio applications. The OM2 is known for its clear and accurate sound reproduction, resistance to feedback and ability to handle very high sound pressure levels without distortion.