T-Rex introduces SpinDoctor2, a triode programmable preamp  with four channels of T-Rex tone and tone controls that let you tune your tone (bass, mid, treble and presence) for each individual channel. The SpinDoctor2 also has Read & Write automation, gain controls, resourceful speaker-simulation output to plug into a studio mixer or AD converter, and motorized knobs that move when you switch channels, like faders on a mixing board.