AC-20 is the smallest and most portable of the NU-X acoustic guitar amplifier range, delivering 25W output from a compact angled cabinet with mains or internal battery operation. The top panel has inputs for both acoustic guitar and vocal microphone with individual volume controls. The top panel also has an internal digital reverb effect, 3-band EQ and a built-in tuner function. Editing of parameters is further possible in the free-to-download Stageman mobile app for iOS or Android via Bluetooth. Audio can also be streamed to the AC-20 for tracks to play along with. Rear panel connections are for headphones output, line output and aux input. A well-featured, compact and easy to use acoustic/vocal amplifier for small venues, busking and rehearsals.