Monoprice SB20 50-Watt All Tube 2-channel Guitar Amp Head with Reverb, Overdrive. Barely used and in new condition. I changed out the 12ax7 preamp tubes to some higher gain ones. Nice amp, good pedal platform.Rock tones but not high gain w/o a boost pedal. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Guitar Amplifiers". The seller is "ratedlexx" and is located in this country: US. This item can be shipped to United States.