12-channel Compact Mixer with 3-band EQ per Channel, Built-in Effects, 4 Stereo Channels, and USB I/O. With the ProFX Series, Mackie again provides an affordable mixer with pro features! With the 12-channel ProFX12, small- to medium-sized gigs are easily handled. Low-noise preamps offer plenty of headroom and the built-in RMFX processor offers 16 "Gig-Ready" effects for truly professional mixes. The ProFX12 lets you pipe your 2-track mix straight to a computer via the USB port. All mic channels boast insert points, a 100Hz low-cut filter, and phantom power, a nice touch on mixers at this price. The ProFX12 rocks!