The Sienna 16 Pro is a 16-watt combo amplifier With an 8-inch Sienna speaker that is specifically designed to both reproduce and enhance the natural sound of your guitar or other acoustic instrument. The approach is more "hi-fi" in nature. Features include both Guitar and Mic/Line inputs, a 4-band EQ system and analog spring Reverb to add ambience. Includes headphone jack for quiet Practice. The Sienna 16 Pro lets you fine-tune your sound and amplify it in a way that brings out its best qualities.