Programmable potentiometers serve to store tone and effects settings in 128 memory slots. The included MIDI board affords easy access to these presets. Coreblade saves sounds straight from the amp to a USB stick so touring artists can travel with no more than an axe and a stick and Coreblade owners can readily swap sounds. TSC, the built-in tube technician, ensures maintenance-free operation. It automatically biases the amp to extend tube life, shuts down defective tubes to get you through the gig, and indicates ratings to make tube selection an exercise in convenience. TSC even lets you operate EL34 and 6L6GC tubes simultaneously!