Roland KC-550 4-Channel 180-Watt Stereo Mixing Keyboard Amplifier Bundle with Microphone, 20-Foot XLR Cable, 20-Foot Instrument Cable, 1/8-Inch-to-RCA Cable, Headphones, and Polishing Cloth 180 watts of power 15" speaker and horn tweeter 4 channel operation 3-band EQ Shape switch for quick tonal adjustments