With a professional array of inputs and outputs, a four-channel mixer, powerful amplifier, and ingenious design, the MMA-130 is an incredibly versatile monitor amp. It"s a great choice for street performances by an acoustic musician, keyboardist, or mobile DJ, and can also be used as a stage monitor. An integrated mounting hole allows the MMA130 to be used with a speaker stand, or to act as a base for the Wavedrum stand. The MMA130 can operate on batteries, and can also provide power to another Korg musical instrument via the 9V DC output jack.