The Keeley Electronics Oaxa Dual True Stereo Phaser is a two-channel stereo phaser released in October 2025. It puts two phaser engines in one pedal, each with its own footswitch, and Guitar Pedal X describes the effects inside as very vintage-styled1. It joins a family of Keeley pedals built in the same enclosure as the Halo Core, Rotary and Zoma pedals1.
The controls and footswitches
The Oaxa is built around two phaser channels, Phase One and Phase Two, each with its own footswitch. The knob layout covers Feedback, Rate, Stages and Depth, with the Stages control offering X (10), IV (4) and V (Uni-Vibe) settings1.
| Control | What it does |
|---|---|
| Feedback | Shapes the phaser's feedback |
| Rate | Sets the modulation speed |
| Stages | Selects X (10), IV (4) or V (Uni-Vibe) |
| Depth | Sets modulation depth |
| Phase One footswitch | Engages the first phaser channel |
| Phase Two footswitch | Engages the second phaser channel |
The footswitches do more than turn channels on and off:
- Double-click plus hold on each channel allows you to control that channel1
- Pressing both footswitches together changes the Mode from Parallel to Series1
The pedal includes 11 demo slots for storing settings1.
Where it sits in the Keeley range
The Oaxa shares the exact same format as the Halo Core, Rotary and Zoma Reverb pedals1. Guitar Pedal X's Stefan Karlsson noted the RCA-style knobs and the color variants, while questioning where the knob style came from1.
What reviewers said
Guitar Pedal X's Stefan Karlsson liked the concept but had reservations about the enclosure1:
"It’s a really cool effect for sure - a Dual Stereo Phaser sounds pretty fantastic - but I would have preferred it the more compact enclosure."
For more on the effect type generally, see Phaser Pedals.
Videos
Premier Guitar
Keeley Electronics
Keeley Electronics
Questions
What is the difference between the Oaxa and the Keeley Halo Core?
They are different effects that share the same enclosure format. The Oaxa is a dual true stereo phaser, while the Halo Core is a rotary-style pedal. Guitar Pedal X notes the Oaxa is the exact same format as the Halo Core, Rotary and Zoma Reverb, so players familiar with those Keeley pedals will find the same footprint and layout on the Oaxa.
What does Phase One and Phase Two mean on the Oaxa?
The Oaxa carries two phaser channels, each with its own footswitch: Phase One and Phase Two. Each footswitch engages its channel, and a double-click plus hold on a channel lets you control that channel. Pressing both footswitches together changes the Mode from Parallel to Series, which changes how the two phaser stages are arranged in the signal path.
How do you change modes on the Oaxa?
Pressing both footswitches together changes the Mode from Parallel to Series. For individual channel control, a double-click plus hold on each channel's footswitch allows you to control that channel. The pedal also includes 11 demo slots for presets.
What is the Black Edition Custom Shop version?
The Oaxa comes in two colour versions: Purple as the standard version and a Black Edition as a Custom Shop version. Guitar Pedal X reported that both are available for the same $199 via one store item, so the Custom Shop treatment is a colour variant rather than a differently priced model.
How much does the Keeley Oaxa cost?
Both colour versions, the standard Purple and the Black Edition Custom Shop, list at $199 USD as of the October 2025 release coverage by Guitar Pedal X.
Sources (1)
- Guitar Pedal X, Guitar Pedal X, 2025-10-24
