Mad Professor

Mad Professor Electric Blue Chorus Guitar Pedal

Sale price $149.99 Regular price $259.95

The Electric Blue Chorus pedal from Mad Professor offers their unique take on the chorus effect by creating a pedal with universal appeal.

A chorus effect is achieved by mixing a dry signal with a modulated signal (vibrato, delay, etc.) simulating the effect of more than one instrument playing the same part. Traditionally one would mix a vibrato effect and a dry signal in equal portions to get the chorus effect. This may lead to a metallic quality of sound.

We wanted to design a chorus pedal, that would please ALSO people, who do not generally like chorus pedals.

With the EBC “Blend” knob you can adjust the mix of these two and get tones from mild to wild.

The Electric Blue Chorus (EBC) uses a sine wave generator for a more pleasing and gentle “liquid wave” sound.
The EBC has a very musical modulation with even stronger chorus settings and tones that lean toward vibrato that sets it apart from most other chorus pedals.
With the “Depth” and “Blend” knobs one can also adjust in a very mild, barely audible chorus that adds some dimension and depth to your tone.

The EBC is also very quiet and transparent with very little filtering. Traditionally chorus pedals have had a treble loss, noise, or a metallic tone especially when used with distortion.

The EBC was designed to be used with both clean and distorted tones and works equally well both in front of or after a distortion pedal.


Blend: this is a control for setting the mix of the modulated and the dry sound. Turn it up for a more intense effect
Depth: this a control for setting modulation depth. Turn it up for a deeper effect.
Speed: this is a control for setting the speed of the internal oscillator

Sample settings (clock positions):

Strong chorus: Blend 5, Depth 3, Speed 12

Floating vibe-tone: Blend 5, Depth 4 ,  Speed 10

Fast rotating speaker: Blend 3, Depth 3,  Speed 5

Mild chorus: Blend 12, Depth 12, Speed 12

Electrical specifications

Input impedance: approx. 400K
Output impedance: approx. 2K
Power consumption: 40mA@9VDC
DC supply voltage range: 9-12 VDC

Power requirements :

6F22 9V battery or DC eliminator 2.1 mm plug center negative and positive sleeve.