A compact "command center" for use with Model 76D, Model 76DA, Model 760-01, Model 760-02, Model 760-03, Model 780-01, Model 780-02, or Model 780-03 Central Controllers. Provides additional user locations with the most frequently desired functions: level adjustment, reference level, and dim. Up to three Model 71s can be connected to, and powered by, a central controller.