The Mackie Big Knob Studio+ Monitor Interface is a modern version of the original Big Knob Studio Command System combining intuitive design with high-resolution Onyx mic preamps and seamless integration with all major DAWs. Equipped with USB connectivity the Big Knob Studio+ features TRS combo and 1/4 jack input connectors along with 1/4 jack balanced/unbalanced output connectors and dedicated headphone outputs.