Switch up to 3 sets of speakers with talkback mic and up your studio monitoring game with the Mackie Big Knob Series monitor controllers. The Big Knob Studio Plus adds even more inputs and outputs. I setup my Big Knob with 2 different sets of studio monitors and ran a subwoofer on the last set of outputs. Toggle any speaker set or sub quickly on and off or run them all together if you want! This helps so much when trying to accurately mix a track or get the voice over level perfect in the mix.