Roland KC-60 3-Channel 40-Watt Keyboard Amplifier Compact, affordable keyboard amplifier with legendary KC sound 40-watt output power with 10 " speaker and independent tweeter Subwoofer output for low-end boost (compatible with most subwoofers) 3-channel design includes 1/4 " Line input and XLR Microphone input Stereo auxiliary input (RCA type) for connecting CD or MD players Rotary controls for adjusting channel and headphone levels, plus Low and High EQ