The Roland KC-990 4-channel keyboard amplifier is an outstanding solution for amplifying your keyboard and synthesizers, complete with onboard mixing and full-range stereo sound. In fact, it's also a well-equipped portable PA, with an auxiliary input for external audio and XLR microphone input for vocals. With dual 12" woofers and separate tweeters, driven by 320 watts of power, the KC-990 is ready for practice sessions and gigs. Built-in effects allow you to spice up your sound with reverb, chorus, and rotary speaker emulation. And for more input channels, or simply to push more air, you can link two KC-990 amps together using the stereo link connection. If you are searching for a versatile keyboard amplifier, you've found it in the Roland KC-990.