Note: This will erase all current presets and restore the factory sounds, so please save your sounds on a second source if necessary.   AMPLIFi 30/75/150/TT: Press and hold the Master Volume knob and Tone button as you power up the amp.   AMPLIFi FX100: Press and hold the Master Volume knob and the TAP button as you power up the unit.   Axsys 212 or AX2: Press and hold the "User/Preset" and "Save/Store Sounds" buttons, and keep holding as you turn the unit on.