Mad Professor Stone Grey Distortion


MP-SGD Stone Grey Distortion

The Stone Grey Distortion is what you need when it comes to high gain and heavy distortion where you can hear every string in detail.

This pedal is ready for heavy-duty drop tunings, 7-string guitars and extreme gain conditions where the sound remains razor-sharp.

When the gain is turned down, the Stone Grey Distortion acts as a lighter overdrive where dynamics and feel are its strong point just like the other Mad Professor pedals.



VOLUME: Sets the output level of the distorted signal.

TONE: This is a boost/cut “shelving” type equalizer that controls the amount of high-end, operating somewhere between a bright switch and the treble control on most amplifiers.

DISTORTION: Sets the level of distortion.

– lower levels more overdrive-like textures

– higher with heavier distortion.



Current consumption: 8mA at 9VDC

Voltage supply range: 7,5-15 V

Input impedance: approximately 500K

Recommended Output load: 50K or higher

Complete bypass (true bypass) and input of circuit grounded when in bypass.

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

CAUTION: Never operate the unit with its bottom removed or damage will most likely occur.