Roland KC-550 4-Channel 180-Watt Stereo Mixing Keyboard Amplifier Flagship keyboard amplifier with powerful 180-watt/15" speaker and horn tweeter Output Select feature and convenient Shape switch for tonal adjustment 3-band EQ and Subwoofer output compatible with the KCW-1 XLR Line output for connection to mixing consoles Stereo Link In/Out for chaining to KC-550s for stereo applications