Not much. Just saw a guitar/bass version go on Ebay under $150. Researching, there were a bunch of 260 series from guitar to bass to monitor to pa versions, some with or without effects, etc. I think mine is the guitar/bass version marketed to both uses, and is rated for 2 ohms. I really like it - its got an crystal tele-twank clean like a JC120, and in series with full mids, backing off the bass and treble, its got a darn smooth overdrive. Reverb is good. I'm thinking there is something to this analog solid-state sound that pre-dates todays digital amps. Cabinet is not as long as a Marshall, so it sits on my 12" and 15" cabs without hanging over. And it is loud.