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Keeley Seafoam Plus Chorus Pedal
Chorus/Vibrato/Flanger/Reverb Pedal for Guitar and Bass
Practically Endless Modulation Potential for Guitar and Bass
Keeley claims the Seafoam Plus tri-mode chorus pedal packs "a new style of chorus that actually sounds right." A big claim, but it's hard to argue with once you've put this versatile pedal through its paces. It uses Keeley's Automatic Double Tracking (ADT) developed for their Double Tracker pedal to create what Keeley calls "True Chorus," which creates second and third voices with slightly different timing and pitch characteristics. The result is lush and wide, even more so when you dial in reverb with the Space knob. And with selectable voicings optimized for either guitar or bass, the Keeley Seamfoam Plus is one of the most versatile chorus pedals you'll find.
Choose from Modern or Vintage voicings
Keeley equips the Seafoam Plus pedal with an internal switch to select from Modern (default) and Vintage modes. Modern mode is an ultra-wide, lush, high-fidelity chorus effect. Vintage mode sounds softer, smoother, and warmer.


Ideal for bass too
Speaking of internal switches, you'll find another inside the Seafoam Plus pedal that switches between Guitar (default) and Bass modes. Guitar mode is optimized for guitar. Bass is optimized for bass. Choose wisely.
Dual Chorus Mode for unique modulation effects
At Sweetwater, one of our favorite features on the Seafoam Plus pedal is the Dual Chorus mode. It's a frequency crossover-based chorus effect that allows you to target either the high or low end of the frequency spectrum. Said another way, you can add a subtle shimmer to your highs without affecting lows, or create a throbbing bass range with a stable top end.

Keeley Seafoam Plus Tri-mode Chorus Pedal Features:
- Chorus/flanger/tremolo/vibrato/reverb pedal for guitar and bass
- Internal switches to toggle Guitar/Bass and Modern/Vintage modes
- Reverb available in Dimension mode (via Space knob) for adding sweet ambience
- Seafoam mode features vintage bucket brigade-style chorus with an adjustable Tone control
- Dual Chorus mode allows you to affect just your highs or lows for sonic creativity
Specification | Detail |
---|---|
Pedal Type | Chorus/Vibrato with Reverb |
Analog/Digital | Digital |
Inputs | 1 x 1/4" |
Outputs | 1 x 1/4" |
True Bypass | Yes |
Bypass Switching | True Bypass |
Power Source | 9V DC 100mA power supply required (sold separately) |
Power Usage | 65mA |
Height | 2" |
Width | 2.67" |
Depth | 4.4" |
Weight | 0.61 lbs. |