Mackie PROFX4 4-Channel Compact Mixer with Effects The latest development in Mackie's small format mixers, the ProFX series sounds better than ever and supplies convenient features at every knob, fader, input and putput. This is the ProFX4, the smallest of the ProFX line. It features 2 extremely low-noise Mackie Vita mic preamps designed to add life to any input, as well as the all-new ReadyFX effects engine with 16 great-sounding effects including reverbs, delays and choruses. A 5-band graphic EQ is available on the master output, switchable for tuning mains or monitors, and an aux output is perfect for driving a monitor mix. There is a 2-band EQ (80Hz and 12kHz) on all three input channels. The input scheme features two XLR inputs with TRS option, as well as a dual 1/4" stereo input channel. You can directly connect guitar, bass and other instruments via Hi-Z input or connect a microphone and take advantage of the Vita preamp. It features a 100Hz low-cut filter and 48V phantom power on all mic channels, along with a stereo RCA tape I/O with input level control. A headphone output with separate level control gives your engineer a second point of reference. Mackie 's legendary Built-Like-A-Tank design is reflected in the solid steel chassis, tough ABS side protection, and quality posts and knobs combine to protect your investment. Rugged and roadworthy are two of the most common adsjectives used to describe Mackie equipment. With mixers, that is a critical attribute.