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The ultimate in transparency, the Mad Professor Simble drive delivers the most organic overdrive you can imagine. Use it as the cleanest boost, for a little tube-like tone sweetener, or a crunchy overdrive. The sensitivity of the Simble is unmatched and can be controlled with the Sensitivity Knob; tweak the rest of your tone with the Level, Accent, and Contour knobs.

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Product Specs

  • Simble Overdrive
  • Brown
  • 2010s

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The Mad Professor Simble is a transparent, organic overdrive with controls for level, accent, contour and sensitivity to retain the original tone of your guitar and the touch of your fingers. 

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Carbon-Offset Shipping

Your purchases also help protect forests, including trees traditionally used to make instruments.

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