Reissue Series All-valve design 3 x ECC83 valves 2 x EL34 valves Authentic DSL sound Footswitchable channels: Classic Gain and Ultra Gain Tone Shift button reconfigures the mids 'Deep' button adds a resonant bass boost Independent gain and volume controls for both channels Shared tone controls for treble, middle, and bass Emulated line output Series effects loop Footswitch included