Great multi purpose combo amp.
Two Mono channels and one Stereo Channel. Plug a bass into Channel 1, a guitar into Channel 2 (there's a built in Distortion circuit on that channel) and a keyboard, computer or mp3 player on channel 3/4. Individual phone outputs with dedicated Volume controls.
Great for jamming along with friends, teacher/student sessions, as well as of course as a standard bass amp using just channel 1 (great bass sound indeed).