Switch between two amps or turn them both on a once - Setup your effects loops to run in series or parallel, control what loops are on and, in series mode, what their order is. - Multi-instrumentalists can connect up to three instruments into one amplifier - Mix three instruments together and control the volume of each. - With its Dry Level control, the Switchblade Pro is great for bass players - The Switchblade Pro prevents tone-suck when vintage, non-true bypass pedals in its FX loops are disengaged.