Audio-Technica AT8681 Unimix 2-to-1 Microphone Combiner with Balance Control The AT8681 combines the output from two microphones into one channel. The balance control attenuates each microphone by 6 dB (typical) at midpoint. Features: professional xlr-type input/output Connectors can be installed anywhere in-line, either at the mixer input or near the microphone 24-48v DC phantom power and balanced cables required for operation permits phantom voltage to pass on to the microphone rugged steel housing