Like any good producer, you want to make sure your mix sounds good on a variety of different playback systems, so grab yourself the Radial MC3, a monitor controller that allows you to switch between monitors, sub woofers, and headphones at the click of a button. The passive MC3 gives you the ability to control two sets of monitors and a sub woofer without any kind of coloration or sonic distortion typically caused by active circuitry. This little DI box offers up a "set and forget" dial for each output to maintain levels, and the sub woofer out is equipped with a polarity reverse switch to give you more room to play with your sound.