The Mad Professor Stone Grey Distortion is a Mad Professor distortion pedal, currently around $119.99. Close alternatives include the Suhr Riot and the Horizon Devices Precision Drive. It pairs well with the Dumble Steel String Singer and the Revv Generator 100R MkIII 3-Channel Head.
Mad Professor Stone Grey Distortion
Mad Professor · pedal
The Mad Professor Stone Grey Distortion is a high-gain distortion pedal with Volume, Distortion, and Tone controls, the Tone acting as a boost/cut shelving EQ similar to a bright switch. It is built to retain note clarity and a tight low end even at extreme gain, staying usable on extended-range guitars such as seven, eight, and nine strings without turning to mud. Lower Distortion settings behave more like an overdrive, while higher settings deliver a fierce, high-gain attack, making it a distortion pedal that can also function as an overdrive rather than only excelling at one end of the gain range. It is designed to add drive on top of an amp's own voicing rather than overriding it.
- distortion
- overdrive
- gain
- eq
- bright
- tight
- high gain
- clarity
Price updated Aug 27, 2026
Genres the Mad Professor Stone Grey Distortion is commonly used in
- Metal
- Hard Rock
- Heavy Metal
cited
Inferred from shared tonal signals, not a stated genre tag. - Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Death Metal
cited
Inferred from shared tonal signals, not a stated genre tag. - Djent
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Mad Professor Stone Grey Distortion
Dumble Steel String Singer
Dumble
24% matchDumble Steel String Singer's smooth balances out the bright tone
Revv Generator 100R MkIII 3-Channel Head
Revv
23% matchRevv Generator 100R MkIII 3-Channel Head leans smooth right where the bright tone needs it
Orange Little Bass Thing
Orange
tonal matchOrange Little Bass Thing's warm balances out the bright tone
Ampeg V-4
Ampeg
tonal matchStack Ampeg V-4 on top and a high gain tone tightens toward mid-forward
Fuchs ODS II Custom 25/50 Combo
Fuchs
tonal matchFuchs ODS II Custom 25/50 Combo's warm balances out the bright tone
Gibson GA-50
Gibson
tonal matchGibson GA-50 leans warm right where the bright tone needs it
Gallien-Krueger Fusion 210
Gallien Krueger
tonal matchStack Gallien-Krueger Fusion 210 on top and a high gain tone tightens toward mid-forward
Ampeg V4-B Head
Ampeg
tonal matchAmpeg V4-B Head leans smooth right where the bright tone needs it
Pedals that stack with the Mad Professor Stone Grey Distortion
Spaceman Explorer 6-Stage Phaser
Spaceman
21% matchKeep Spaceman Explorer 6-Stage Phaser after Mad Professor Stone Grey Distortion in the signal chain, clear of Mad Professor Stone Grey Distortion's own gain stage
Electro-Harmonix Green Russian Big Muff
Electro-Harmonix
21% matchElectro-Harmonix Green Russian Big Muff leans smooth right where the bright tone needs it
Shin's Music Dumbloid
Shins Music
18% matchStack Shin's Music Dumbloid on top and a high gain tone tightens toward tight
Crazy Tube Circuits Golden Ratio
Crazy Tube Circuits
17% matchCrazy Tube Circuits Golden Ratio's own tight character is the real reason this is worth trying
Boss DD-3 Digital Delay
Boss
15% matchBoss DD-3 Digital Delay's transparent voice goes after Mad Professor Stone Grey Distortion in the signal chain — it's not there to compete with Mad Professor Stone Grey Distortion's own bright character — goes in the amp's FX loop (or last, into a clean amp)
Boss DD-8 Digital Delay
Boss
15% matchPut Boss DD-8 Digital Delay after Mad Professor Stone Grey Distortion in the signal chain, clear of Mad Professor Stone Grey Distortion's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Tone City King of Blues
Tone City
tonal matchMad Professor Stone Grey Distortion leans into a clean amp's front end, precisely the platform Tone City King of Blues wants
Boss VB-2W
Boss
tonal matchMad Professor Stone Grey Distortion leans into a clean amp's front end, precisely the platform Boss VB-2W wants
Cheaper alternatives
MXR Super Badass Distortion
MXR
72% similarityShared character: tight_low_end, bright, high_gain_settings
DigiTech DHH Hot Head
Digitech
66% similarityShared character: tone_control, high_gain_settings, distortion
Carl Martin Crush Zone
Carl Martin
96% similaritysimilar tone character
JHS 3 Series Distortion
JHS Pedals
96% similaritysimilar tone character
Boutique & premium upgrades
Airis Effects -Nemesis Preamp
Airis Effects
73% similarityShared character: pedal, hard_rock, high_gain_settings
Analog Man King of Tone
Analog Man
71% similarityShared character: pedal, high_gain_settings, amp
Crowther Hot Cake
Crowther
71% similarityShared character: high_gain_settings, amp, distortion
Revv Amplification Mauler
Revv
96% similaritysimilar tone character
J. Rockett 10 Ton Hammer Overdrive
J Rockett
96% similaritysimilar tone character
Fortin Amplification Natas
Fortin Amplification
95% similaritysimilar tone character
Similar charactersee all similar tone character →
Suhr Riot
Suhr
73% similarityShared character: tone_control, volume, hard_rock
Horizon Devices Precision Drive
Horizon Devices
73% similarityShared character: pedal, attack, bright
Klon KTR
Klon
72% similarityShared character: high_gain_settings, amp, distortion
Fulltone OCD V2
Fulltone
71% similarityShared character: tight_low_end, high_gain_settings, amp
MXR Van Halen
MXR
63% similarityShared character: tone_control, high_gain_settings, distortion
Catalinbread Carbide Purple Gaze
Catalinbread
96% similaritysimilar tone character
See all alternatives to the Mad Professor Stone Grey Distortion (cheaper + boutique) →
Questions people ask
What are good alternatives to the Mad Professor Stone Grey Distortion?+
The closest matches in character are the Suhr Riot, the Horizon Devices Precision Drive, the Klon KTR. Budget picks: MXR Super Badass Distortion, DigiTech DHH Hot Head, Carl Martin Crush Zone. Boutique upgrades: Airis Effects -Nemesis Preamp, Analog Man King of Tone, Crowther Hot Cake.
What pairs well with the Mad Professor Stone Grey Distortion?+
Strong matches from rig and tone-complementarity evidence: Dumble Steel String Singer, Revv Generator 100R MkIII 3-Channel Head, Orange Little Bass Thing — Dumble Steel String Singer's smooth balances out the bright tone.
How much does the Mad Professor Stone Grey Distortion cost?+
Around $119.99 (live listing price, updated Aug 27, 2026).