The PW4EX 4-Channel Mic/Line Mixer from Powerwerks is a mixer that features a high signal-to-noise ratio, reliable performance, and is equipped with a mono output. It can be used as a standalone mixer or as a system expansion to other mixers to give you more channels with volume along with bass and treble EQ controls. The XLR inputs offer 17V phantom power for compatible microphones. The main XLR or 1/4" out can send a mix to a powered speaker or to the input of another mixer, allowing the PW4EX to be used as a submixer. The Powerlink port allows blending of even more instruments, microphones, and program music with other Powerlink equipped models. An AC wall adapter is included.