Mad Professor Electric Blue II

The good folks at Mad Professor unveiled MkII of their Electric Blue Chorus/Vibrato, which adds two key features:

  1. The original model was just a Chorus, this is also a Vibrato
  2. MkII features a Tone knob.

Built with high-end components as we have come to expect from the Finnish builder, the Mad Professor Electric Blue II can deliver a variety of modulated tones with its simple four knob layout.

The Tone knob allows a range of colors from warm/vintage to bright/modern, and in Chorus mode the Speed knob affects several parameters, optimizing the delivery at fast and slow LFO settings.

The vibrato is presented as a fully original design, described by the builder as “the most expressive vibrato with expanded vocabulary.”

I guess you can check that out for yourself in the videos below. We added the Mad Professor Electric Blue II to our list of Best Chorus Pedals.


Chorus Vibrato is a super high-quality modulation pedal with a small footprint. It is simple-to-use yet surprisingly versatile. Vintage technology and modern engineering ensures the most organic and purest analog tone and ultra-quiet performance. Electric Blue II is innovative and beautifully complex all analog bucket brigade design.

Warm or bright? Blast from the past or from today and everything in between? You get to choose. The effective and thorough, yet simple to use, controls allow you to explore analog modulation like never before.

CHORUS mode is designed to deliver slow, traditional chorus effects and faster faux-leslie type effects and everything in between. Turning the SPEED control will also affect and alter multiple things, allowing Electric Blue II to sound just right and capture all the nuances, whether slower or faster swirls are being dialed in. And whether it is warm vintage or modern chorus guitar tone you are after, Electric Blue II will deliver astonishing and finest of the finest tone!

In most cases, VIBRATO is only an effect that was born aside when a chorus pedal was designed. We were on a mission for taking the opposite approach and dedicated ourselves to design the most expressive vibrato with expanded vocabulary. Vibrato effect in Electric Blue II is completely and fully its own design, that is the most clever and intuitive vibrato out there. The well-thought-out controls and the ability to also beautifully function with distorted tones, extend the versatility and sonic possibilities like never heard before!