Grunt. Nothing but pure Grunt awaits with this high gain Jfet preamp. Featuring a full TMB tone stack with mids voicing and a footswitchable boost to add that little something extra, of course you can always feed your favourite overdrive or boost into Grunt. This pedal is a full-on preamp and is designed to run directly into a power amp, effects loop return or even straight into an interface. It is not recommended to plug this into an amps preamp. Nail the same grunty tones at every show into any amp.