The Behringer Ultracoustic AT108 Acoustic Combo Amp is a compact 2-channel, 15W amplifier specially attuned to the sonic needs of acoustic instruments. You get Behringer's Virtual Tube Circuitry (VTC) for a truly tube-like sound. The AT108 combo amp features a powerful 20W dual-cone 8" speaker with a wide frequency response, a mic input with separate volume control, and a dedicated CD input so you can play along with your favorite CDs. The Behringer AT108 also features an ultramusical 3-band EQ for ultimate sound shaping and a headphone output for quiet practice.