Digitech Bad Monkey Tube Overdrive Guitar Pedal The Bad Monkey Tube Overdrive gives your guitar amp a boost just when you need it. This rugged pedal produces the smooth natural character of an overdriven tube amp while maintaining your guitar's distinct tone. Low and High tone controls give you the flexibility to boost or cut the bass and treble frequencies for just the right sound. Get a Bad Monkey and supercharge your amp's tone. Level boosts the output level of your guitar signal. Low adjusts boost and cut of bass frequencies. High adjusts boost and cut of upper harmonics. Gain provides smooth tube amp distortion to your sound. Dual Outputs. The Amp output is for connecting directly to a guitar amplifier. The Mixer output features Cabinet Emulation circuitry for connecting directly to a mixing board or recording device.