"VOX" AD50VT-XL Valvetronix "Extreme Lead" Combo Amp.Features 2 - 12" speakers and is a 50 watt 12AX7 powered by a tube/solid state Hybrid Valvetronix amplifier circuit. This amp sports many features, a external speaker jack, headphone jack, eleven amp models, adjustable watt pot on rear to adj. watts from 0-50watts. I do have the manual and for an awesome Demo of this amp...go to Youtube and type in the Model and check out guitar World.