Round Out Your Rig with Enveloping ’verb and Rhythmic Tremolo
The Keeley Zoma expands your tonal palette with a suite of inspiring and spacious sounds, combining three Keeley-curated tremolo and reverb pairings to impart a sense of space and depth to your signal. It all starts with a splashy spring reverb and a standard sine wave tremolo that delivers classic amp-like ambience. For a more swampy sound, swap to Zoma’s PH setting — lush plate reverb and chewy harmonic trem. Finally, Zoma’s third setting combines that same plate reverb with the psychedelic sway of a pitch-shifting vibrato. All three of these pairs are easily tweaked to your liking via Zoma’s intuitive 3-knob interface, with three additional parameters unlocked via the Reverb footswitch’s Alt function. What’s more, Zoma offers instant effect order switching, allowing you to choose whether reverb or tremolo comes first in the pedal’s circuit for greater tonal flexibility. Crowned with a handsome metal enclosure with dedicated Reverb and Tremolo footswitches, Zoma is ready to serve as your always-on sonic sweetener.
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Three curated effect pairings
Easily toggled via a 3-way switch, Zoma offers three distinct preset combinations of reverb and tremolo to space out your sound.
- SS: This setting recalls the character of the legendary black-panel amplifiers of yore, blending all the surfy splash of a spring reverb with a standard sine wave tremolo.
- PH: For those who prefer a more studio-style reverb, PH mode unlocks a lush plate reverb emulation. Moreover, PH mode also provides you with the vibe-like richness of an old-school harmonic tremolo.
- PV: The Zoma’s final mode incorporates the same plate reverb voice of PH but swaps out the harmonic trem for a true pitch-shifting vibrato circuit. From a subtle sway to full-on seasick psychedelia, this mode is a favorite of Sweetwater’s most adventurous tone chasers.


Keeley Zoma Features:
- A compact dual-purpose stereo stompbox that provides you with 3 unique tremolo/reverb combinations
- SS mode supplies you with splashy spring reverb and a sine wave tremolo for classic black-panel amp vibes
- PH mode blends swampy harmonic tremolo with studio-style plate reverb
- PV mode unlocks a wavy pitch-shifting vibrato to pair with the Zoma’s stunning plate reverb setting
- Dedicated Tremolo Reverb footswitches and 3 knobs for streamlined and intuitive operation
- Reverb footswitch unlocks additional alternative parameter controls with access to Reverb Decay, Reverb Tone, and Tremolo Volume
- Reverb/Tremolo pairings can be swapped within the signal chain to best suit your style
- Offers both true bypass and trails operation
- Roadworthy angled metal enclosure