Fulltone OCD Obsessive Compulsive Drive vs Mad Professor Mad-Rbo

The Fulltone OCD Obsessive Compulsive Drive and the Mad Professor Mad-Rbo are both pedals sharing transparent, full, mid-forward. The Fulltone OCD Obsessive Compulsive Drive leans harmonically rich and fuzzy.

Similarity
citedBlended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.

38% — somewhat different

Shared genres
citedGenres both listings are associated with.
  • Classic Rock
Shared tone character
citedDerived from overlapping tonal signals across both listings.
  • transparent
  • full
  • mid-forward
  • bright
  • edge of breakup
Citation fame
citedCitation/mention fame — how often this gear is cited across artist rigs and gear discussion.
17%
0%
Price
—

$185.14via Reverb

Description

The Fulltone OCD Obsessive Compulsive Drive is a boutique overdrive pedal known for a warm, full, genuinely tube-like response that bridges the gap between overdrive and distortion rather than sitting cleanly in one camp. Its drive control ramps smoothly from dirty, harmonically rich overtones into fuller saturated distortion, and it responds strongly to pick attack and guitar volume the way a real amp does. An HP/LP switch shapes the voicing: HP pushes more distortion with a pointed, cutting midrange, while LP is subtler and lets more of the amp's own character through. It suits players wanting an amp-like, dynamically responsive drive that can cover both classic-rock overdrive and heavier distortion tones from one pedal.

The Mad Professor Royal Blue Overdrive covers a wide range from light overdrive into full distortion, with Volume, Distortion, Treble, and Bass controls. At its lowest Distortion setting the pedal behaves almost like an EQ stage, adding minimal filtering for a transparent boost. Turning the Distortion knob up moves it into a crunchy, tube-amp-like breakup and eventually into heavier gain. Both Treble and Bass are boost/cut shelving controls, giving broad tonal shaping rather than a single fixed voicing. It is built to go from subtle amp-like grit to genuine distortion within one pedal, and forms the basis of Mad Professor's Supreme A-side circuit.

Genres
citedGenres this gear is documented as being used in.
—
  • Blues
  • Rock
Tonal lean
  • harmonically rich
  • fuzzy
—
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