The Sienna 65 Pro is a 65-watt combo amplifier With a 12-inch speaker that is specifically designed to reproduce and enhance the natural sound of any guitar or other acoustic instrument you throw its way. The approach is more "hi-fi" in nature. Two-inch jacks plus an XLR input add flexibility for interfacing With the amp. You'll find eight 24-bit digital effects, like Reverbs and Echo, to enhance your sound. EQ controls include a Feedback filter very handy for live gigs. Back panel connections are (1) Speaker Out, which disconnects the internal speaker to allow use of an external speaker; (2) 1/4-inch Line Out; (3) Effects Loop Send and Return jacks; (4) a Footswitch jack to turn the Digital Effects on or off. The Sienna 65 Pro lets you fine-tune your sound, and then amplify it in a way that brings out its best qualities.