
Anthony Easton
The Seafoam Plus Chorus by Keeley Electronics is a versatile pedal offering various modes and controls for creating rich chorus and vibrato effects. The technical specifications for the Seafoam Plus Chorus are as follows:
Modes:
1. Dimension Chorus – Automatic Double Tracker
- Rate/Tune: Adjusts the Tune/Pitch of Double Tracked voices by 0-21 cents
- Depth/Time: Adjusts the time delay in the Double Tracked voices by 0-21
milliseconds (ms)
- Space: Abbey Chamber Reverb
2. Seafoam Chorus
- Rate: 0.1 – 7Hz
- Depth: Variable
- Space: Tone Control – +/- 6dB @ 500Hz
3. Dual Seafoam Chorus
- Rate: 0.1 – 7Hz
- High Depth: 0-10ms
- Low Depth: 0-15ms
- Crossover @ 659Hz (12th fret of Hi E). Rate controls both high and low (Low
0.666 of High). High is delayed by 8ms, Low delayed by 6ms
4. Bass Flange
- Rate: 0.1 – 3.5Hz
- Flange Depth: Variable
- Space: Controls positive and negative feedback, 0 feedback in the center
5. Seafoam Bass
- Rate: 0.1 – 7Hz
- Depth: Variable
- Tone: -6dB @ 100Hz to +6dB @ 200Hz
6. Dual Bass
- Rate: 0.1 – 7Hz
- High Depth Chorus: Variable
- Low Depth Tremolo: Variable
- High/Low crossover @ 200Hz (12th Fret G). Rate controls both high and low
(Low 0.666 of High). High is delayed by 8ms, Low is a tremolo
The Seafoam Plus Chorus pedal features three modes: ADT, Seafoam, and Dual Chorus. In ADT Mode, Seafoam layers three distinct voices on top of one another, imparting slight delays and detune to each, for a luscious effect that Keeley has dubbed “True Chorus”. In Seafoam Mode, the pedal operates similarly to a traditional chorus pedal, while in Dual Chorus Mode, it is a split band chorus with a division at the high E string, allowing players to independently control the effect depth for the highs and lows. There is also a Bass Mode with integrated flanger for additional versatility.
Controls:
- Rate
- Depth
- Space
- Mix
The Seafoam Plus Chorus pedal offers a wide range of functionality and control, making it suitable for guitar and bass players seeking to create lush, wide, and musical chorus and vibrato effects.
Watch the latest video demos and reviews for the Seafoam Plus Chorus from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the Keeley Seafoam Plus Chorus from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Brand New
$214.84

Brand New
$189

Brand New
$160.65

Brand New
$205.83

Brand New
$189

Good
$92.93

Brand New
$189

Discover pedals with similar features or sounds to the Seafoam Plus Chorus. This section leverages data to suggest alternatives that complement or expand your pedalboard. Ideal for exploring related sounds or finding a pedal that matches your specific needs.

Mojo Hand FX
Villanova

NUX
Tape Core

Hotone
Choir

DLS Effects
Chorus Waves

Arion
SCH-Z Stereo Chorus

Foxgear
Ballade

Keeley
Monterey Rotary Fuzz Vibe

Moen
Shaky Jimi

Guyatone
Chorus Box

Old Blood Noise Endeavors
Visitor

Hotone
Roto

Old Blood Noise Endeavors
Reflector

Beetronics FX
Seabee Harmochorus

Outlaw Effects
Vigilante Guitar Chorus Pedal

Catalinbread
Pareidolia

Effectrode
Tube-Vibe
Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton