Capture the classic hot tube powered distortion tone of a valve combo amp without having to lug around a giant stack of amps with the Vacuum Stack, a valve stack simulator stompbox from budget guitar effects pedal maker Tomsline. You get three distinct voicings: a full-bodied Fat mode, a Normal mode, and a juiced-up Boost mode. The Vacuum Stack features Tomsline’s patented stop bar design to keep your foot from messing up the pedal’s settings when you stomp on it. https://www.tonebox.com/pedal/tomsline-vacuum-stack