16-channel 4-bus Mixer with Built-in Effects and USB. Think of the Mackie ProFX16 16-channel 4-bus mixer as your "audio swiss army knife." If you've got a band or a midsized venue that needs pro sound - but don't have the space or budget for mountains of outboard gear - the ProFX16 is your sonic problem solver. Onboard, you've got ten Mackie low-noise mic preamps, 3-band EQ with sweepable mids, integrated gig-ready effects, precision 7-band GEQ, and more. You'd need a semi for all this in the old days. Now Mackie packs it all into a great-sounding, roadworthy mixer you can fit in a rack! If you're in need of a new mixer, the Mackie ProFX16 should be on your short list.