Two of the most popular "amp-like" drives, often cross-shopped. The Klon is a clean, transparent boost/light-drive that keeps your amp’s voice; the OCD is a gainier, more amp-in-a-box overdrive with more grit and low-end thump on tap.
| Klon Centaur | Fulltone OCD | |
|---|---|---|
| Gain range | Low — a boost to light breakup; shines pushing an already-dirty amp. | Low to medium-high — goes from edge-of-breakup to genuine crunch/rock rhythm. |
| Tone shape | Transparent with a slight treble/clarity lift — keeps your core tone. | More coloured and mid-present, with a fuller, thicker low end. |
| Cleanup | Excellent — tracks your guitar volume closely. | Very good, especially with the HP/LP switch on the low-cut side. |
| Best at | An always-on clean boost + a little grit; stacking into other drives. | A standalone rock/crunch sound from a clean amp. |
| Character | Subtle, refined, "did I leave it on?" transparency. | Louder, grittier, more obvious — a rhythm-rock workhorse. |
Get a Klon-style pedal if you want a transparent boost that preserves your amp’s tone while adding size and light grit (great for pushing a dirty amp). Get a Fulltone OCD if you want a gainier, more coloured amp-in-a-box that can produce real crunch and rock rhythm from a clean amp. The Klon enhances; the OCD drives.