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Keeley Electronics Seafoam Plus Chorus Chorus/Vibrato Guitar Effects Pedal

The perfect addition to any guitarist's or bassist's rig, the Keeley Electronics Seafoam Plus Chorus redefines the chorus effect with unparalleled chorus tones and so much more!


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Discounted Price $189.00
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Discounted Price $189.00
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Keeley Engineering is changing the minds of even the most picky players… again.

Keeley redefined chorus. There is a new style of chorus that actually sounds RIGHT.

Keeley Engineering is proud to announce the Seafoam Plus Chorus – True Chorus and ADT with Reverb. It will forever change the way you think about chorus, because they have developed a new type of chorus that until now has only been available in expensive DAWs and in studios.  Not only is it tuned for guitar, but there are voices and modes created specifically for bass players including flanging and tremolo. Lastly, this tri-mode chorus pedal offers internal switching for vintage and modern tones, further doubling the amount of sounds you can get.

ADT: THE NEW DEFINITION OF CHORUS. In the Seafoam Plus Chorus you get the automatic doubler that Keeley developed in the revolutionary 30ms Double Tracker. Their ADT chorus is what they call True Chorus, because they create a second and third voice–like singers in a choir. Not only do they sing at different times, they sing at different pitches. True Chorus.

Seafoam Mode: You guessed it… the Seafoam Plus Chorus–lush, wide, and with a very musical vibrato. It gives you the lush sounds and tone of a vintage BBD analog chorus unit. This is where you'll find a typical chorus feature. The Seafoam Mode of the pedal has an LFO, the regularly cycling part you hear in most every other chorus unit. It provides a classic tone that you expect and which has become part of many classic tunes. Set the rate for slow and the depth for wide, and enjoy a really spacious sounding chorus. Roll the Mix Control all of the way up for Vibrato. With the Space control acting as a Tone Control in this mode, you can go from bright to vintage warmth, dialing in the perfect chorus.

Dual Chorus Mode: Keeley Engineering created a frequency crossover-based dual-chorus engine. Imagine a dividing line that is centered on your high E-string. Control the depth of chorus independently for highs and lows. Craft the ultimate "Come As You Are" Nirvana of chorus tones. Create a very deep, throbbing chorus on the low end, and a near perfect calm on the top end. Or make the high-end and shimmer and waver while keeping the low end fixed!

OK, it goes twice as deep. The Seafoam Plus Chorus is a Bass Chorus, Flanger, and Tremolo too! Pop off the back, flick a switch, and it's a bass guitar player's dream. The Space Controls gives you controls or Regeneration, High-pass filtering to keep things tight, and a haunting Tremolo you have to hear to believe! O let's get down and funky, Michelangelo!

Vintage at Heart
Want a softer tone? Chorus that's silky smooth and warm? No problem. Internal switching puts it in "Vintage Mode." The Keeley Seafoam Plus Chorus ships in "Modern Mode" for ultra wide, lush, and high-fidelity chorus. Either way, enjoy sounds that are downright frighteningly good. Makes you wonder, "Is that my fingers playing that tone?!?"

Seafoam Plus Chorus Modes
Dimension Chorus – Automatic Double Tracker
RATE/TUNE: Adjusts the Tune/Pitch of Double Tracked voices by 0-21 cents
DEPTH/TIME: Adjust the time delay in the Double Tracked voices by 0-21 milliseconds (ms)
SPACE: Abbey Chamber Reverb
BASS MODE: Flanger with Space knob for Positive and Negative Feedback control.  Center position is 0% Feedback.  Works perfectly on guitar too.

Seafoam Plus Chorus
RATE/TUNE: Rate from 0.1 – 7 Hz
DEPTH/TIME: Depth from 0-20 ms
SPACE:  Tone Control – +/- 6dB @ 500Hz
BASS MODE: Tone Control -6dB @ 100Hz to +6dB @ 200Hz
Special Notes: This is a simulation of Keeley's popular Seafoam Chorus and other popular vintage chorus pedals.

Dual Seafoam Plus Chorus
RATE/TUNE: Rate from 0.1 – 7 Hz
DEPTH/TIME: Depth of the High Band Chorus 0-10ms
SPACE: Depth of the Low Band Chorus 0-15ms
BASS MODE: Chorus on Top End – Haunting, Throbbing Tremolo on Bottom end.
Special Notes:  High Band chorus is delayed by 8ms and Low Band by 6ms.  Provides Wide Lush chorus on top and Focused Musical Chorus on bass.  Ultra wide and watery sounds!  For Bass Mode:  Band is split Chorus on Top and Tremolo on Bottom.

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Get your Keeley Electronics Seafoam Plus Chorus Modulation Guitar Effects Pedal today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Guitar Effect Pedal


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Warranty Info:

The manufacturer’s warranty covers parts and labor for two years. The warranty excludes damage from misuse, abuse, and contains other exclusions.