Mad Professor Evolution Orange Underdrive FX Pedal - Pedal Jungle
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Mad Professor Evolution Orange Underdrive FX Pedal

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*This is a Special Order item that we order quickly and directly from our suppliers after your purchase and ship to you within 2-5 days.*Get cleaner...

*This is a Special Order item that we order quickly and directly from our suppliers after your purchase and ship to you within 2-5 days.*

Get cleaner overdriven tones with the Mad Professor Evolution Orange Underdrive.

A fresh and innovative approach to the overdrive market, the Underdrive will add that sparkle, clarity and cleanup duty needed at the flip of a switch when the sound gets a little too dirty, dark and muddy, especially for those vintage single channel amps that are running a little hot!

Essentially the Evolution Orange Underdriver is an anti-pedal, adding to your setup by taking away, and a sound you can refine even further via it's 4 EQ tone shaping pots. 

Perfect for those in the market for something a little bit different.

The Details
  • Special Order item
  • Expected to ship within 2-5 days
  • Effect: (Under)drive
  • Made in Europe (Finland)
  • Cleans up overdriven tones
  • Works well with vintage single channel amps
  • Fine EQ shaping
  • Current draw: 10ma
  • 6F22 9V battery or DC eliminator 2.1 mm plug center negative and positive sleeve.
  • 2 year manufacturer warranty

*RRB is protected against wrong DC eliminator polarity. The fuzzy sound is a sign of low voltage. Maintain recommended voltage for best results.

What Do Mad Professor Say?

Evolution Orange Underdrive (EOU) offers a new way to approach your tone. Instead of overdriving your clean tone, now you can get cleaner tones from your favorite overdriven tone. That is what we call underdriving.

Evolution Orange Underdrive works really well with vintage single channel amps that sound great when you push them to overdrive. When you turn down the volume from your guitar to clean that tone, the sound often gets a bit too dark and the clean tones are not as good as the overdriven tone.

With EOU you can tailor your cleaner tone with the four pots. The Evolution Orange Underdrive works by lowering the midrange as that is where the overdrive mostly is. You can dampen the amplifier input with the EOU’s Volume control and then set the Bass and Treble to tailor your clean tone. EOU can also be used to boost the mids by setting the Midrange and Volume up.


MIDRANGE: ± 15 dB at 400Hz

TREBLE: ± 15 dB at 7KHz

BASS: ± 15 dB at 100Hz

VOLUME: sets the overall volume level when the pedal is on

Shipping & Returns


  • Free UK RM48 shipping from orders of £100 or more
  • Orders despatched within 1-2 working days
  • Always tracked worldwide shipping
  • Plastic free packaging as standard


30 day peace of mind return policy, but please read our terms and conditions, returns and refunds policy before placing an order. 

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Hear the Underdrive in action