WIRELESS SYSTEM: RCEP R42 WLESS INTERCHANGEABLE MICROPHONE WITH TWO HANDHELD TRMS H60/OM2 sold, it has a slight bass proximity, a tailored midrange and a full-bodied sound. Ideally optimized for small to medium-sized public address systems, the OM2 is a workhorse microphone known for its excellent stage isolation, excellent feedback rejection, and ability to handle high sound pressure levels without distortion.