The Wampler Gearbox at a glance:

• Two-channel overdrive effects pedal for electric guitar, made in the USA.
  
• Andy Wood Signature Pedal
• Combines a modified Wampler Tumnuns and a modified Wampler Pinnacle in one box
• Fully analog circuitry
• Selectable effects order
• Channel 1 (Tumnus) with controls for Gain, Tone and Level
• Channel 2 (Pinnacle) with 3-band EQ, adjustable noise gate, gain and level controls
• Option to use both channels as separate effects or to integrate an additional effect into the signal path
• Two footswitches
• Sturdy metal housing
• Powered by 9V battery or optional AC adapter
  

Channel 1: Tumnus

Channel 1 of the Wampler Gearbox is based on the popular Wampler Tumnus, whose circuitry has been modified according to Wood's wishes. Channel 1's ultra-transparent drive can be used to boost an amp, stacked with other overdrive and distortion pedals, or as a standalone effect with lively dynamics. To adjust the sound, Channel 1 of the Gearbox has controls for Gain, Tone and Level.

Channel 2: Pinnacle

In Channel 2 of the Wampler Gearbox, the Wampler Pinnacle 's circuitry, also reworked according to Andy Wood's ideas, provides an extremely juicy brown sound. While the gain control is responsible for the intensity of the distortion in Channel 2, the 3-band tone control allows for precise adjustment of the timbre. In addition, the second channel of the gearbox has an adjustable noise gate, which prevents unwanted noise during breaks in the performance.