This is a concept design based on a guitar cabinet simulator, named G312, originally produced in Brazil by Santo Angelo System. 

The original G312 it's a wondeful tool for guitar players who don't have a amplifier easily available in live and practice situations. With that in mind, the G313 combines a reverb module and a bright/normal tone toggle to expand the usabilities, in a enclosure that resembles the classical design of the 60's Silverface era from Fender amplifiers.