HIGH EFFICIENCY AND SUPER DURABILITY. This 2-channel keyboard amplifier is extremely versatile with two inputs and separate volume controls for each channel. Features include Gain, Boost Select Switch, Volume, Treble, Middle, and Bass controls. Includes two 1/4" instrument inputs, 3-band EQ, 1/8" auxiliary input jack for jamming along with media player or CD, 1/8 headphone output jack for silent practice, and DI output port for external active speakers. With a maximum gain of 48dB, this keyboard amplifier supports microphone input for clean and warm tone.