The Roland KC-990 is a compact 320-watt keyboard amplifier with an integrated mixer with four stereo inputs, a dedicated stereo aux input and the option of connecting an XLR vocal microphone. The mixer also offers a master EQ with shape switch and DSP effects. Compared to the previous model, the amplifier section of the KC-990 has been completely revised. The 2-way speaker system with two newly developed 15'' custom woofers and two horn tweeters provides even better sound quality. The amplifier's stereo link function allows easy connection to a second KC-990 for additional inputs and stereo playback on stage. There is also a headphone output and subwoofer output.