The S-1 45 combo delivers both Class A clean style tones and classic push pull crunch depending on the mode selected. ISF allows you to exactly tune your sound and DPR reduces the power down to 4.5 watts. Neo speakers, Midi Switching and a series effects loop make this the ultimate pros combo. 45 watt combo with DPR (dynamic power reduction) 3 x ECC83, 1 x ECC82, 2 x EL34 valves. 2 channels and 4 modes (Footswitchable) Clean channel with warm (Plexi) and Bright (Class A) mode Overdrive channel with crunch and super crunch modes ISF equipped tone controls Presence and Resonance controls Master Volume Series effects loop Midi switching Speaker emulated output 2 x Celestion custom designed neo 12 inch speakers