Check the listing for details. Mackie ProFX30v3 30-channel Mixer with USB and Effects. Condition: New. Listed at 999.99 USD. Robust Mixer that's Ready for the Stage or the Studio Looking for a mixer that makes your life easier when you're gigging? The Mackie ProFX30v3 30-channel USB mixer can do that and much, much more. The ProFX30v3 provides you with great sound and features found in larger mixers while remaining portable. This mixer is equipped with 25 Onyx preamps that provide top-notch sound for your keyboard, mics, and guitars. Once you're ready to go, you can use the onboard GigFX to add that little something extra to your mix. No matter if you're onstage or in your studio, the Mackie ProFX30v3 will always give you amazing audio quality.Everything you need in one device At Sweetwater, we want to make sure that your gig sounds the way you want it to.