The Mbox 3 offers a pair of XLR/TRS combo inputs that accept mic or line level signals and provide 48V phantom power to condenser microphones. The box also has a pair of 1/4" DI instrument inputs on the front panel for easy access. A pair of 1/4" monitor outputs let you connect monitor speakers, mixers, or recorders. Stereo S/PDIF digital I/O connectors allow you to connect digital audio devices, while MIDI I/O connectors provide compatibility with a variety of controllers and devices.

The front panel offers a monitor control section with Mono and Dim controls, as well as a gain controls, and an assignable Pro Tools multifunction button for fast access to software functions. A 1/4" headphone jack with a volume control knob provides private monitoring. A large dedicated monitor volume knob gives you easy control over master volume.

Additional features of the Mbox 3 include integrated DSP for flexible cue mixing and reverb effects, a soft-clip limiter that lets you track hot signals without clipping, and a built-in guitar tuner. The Mbox 3 includes Pro Tools LE 8 software, which has over 70 effects and virtual instruments, plus other tools and features for quick and easy music creation. It also comes loaded with drivers that provide compatibility with Logic, Live, Record, Reason, Fruity Loops, Cubase, Nuendo, Sonar, and more, allowing you to use your favorite DAW solution.