Mackie big knob studio+ delivers a modernized, smart monitoring control solution based on the bestselling big knob, plus integrated USB recording and playback. Professional routing and switching includes a selection of four sources, including USB playback, and a choice between three pairs of monitors, each with independent gain trim to ensure balanced listening levels. Two Onyx mic preamps deliver a convenient, high-quality desktop recording source coupled with high-resolution 192kHz / 24-bit audio conversion for solid sound quality whether recording or mixing. With dual headphone outs, a dedicated amp-driven studio output and flexible I/O options, big knob studio+ is truly a nerve center for any professional studio.