The Guyatone OD-X Overdrive is an analog overdrive pedal built around a real 12AX7WA tube. RockBoard's PedalPedia describes it as working "like adding a second preamp to the front-end of your amp," an additional gain stage that brings out the amp's own character rather than simply coloring it1. It sits among the brand's overdrive pedals, a family that also includes the Guyatone OD-2+ Overdrive and the compact Guyatone ODm5 Overdrive.
How the tube circuit works
Most tube pedals run their tubes at high voltages, but Guyatone's engineers took a different path with the OD-X. The pedal runs 12 volts direct to plate, which RockBoard's PedalPedia says provides just enough juice to bring out the warm, organic crunch of the 12AX7WA while accentuating even-order harmonics1. The result, in Guyatone's description, is a very transparent, dynamically sensitive effect that responds exceptionally well to playing nuances while maintaining clarity and punch1.
For a player, that means the OD-X is designed to sit between the guitar and the amp as a gain stage that tracks picking strength, cleaning up when played softly and pushing harder when dug in, in the way RockBoard's PedalPedia describes1.
The Contour control
The OD-X's Contour control is a combination Notch/Peaking filter centered on the Mid-Hi frequency range around 1 KHz. It offers plus or minus 12 dB of cut or boost at that specific band, and at its center position it provides a perfectly flat response1.
| Control | What it does |
|---|---|
| Contour | Notch/Peaking filter centered around 1 KHz, +/- 12 dB cut/boost at that band; flat at center1 |
That single-band mid control covers the range where overdrive pedals most often fight with an amp's voicing, letting a player scoop the mids for a cleaner rhythm tone or push them forward for solos, all within the behavior RockBoard's PedalPedia describes for the filter1.
Power requirements
The OD-X needs 12V DC, center negative, and draws 150mA1. Both figures matter on a pedalboard: a pedal at this current draw needs a supply output rated for that voltage and current.
The OD-X runs at 12V DC and draws 150mA, so it needs a supply output rated for 12 volts with enough current headroom. It is not a pedal to hang off a standard daisy chain1.
Where it sits in Guyatone's range
Guyatone's overdrive line includes the OD-X alongside the OD-2+ Overdrive and the Mighty Micro ODm5 Overdrive. The OD-X's distinguishing feature in that company is its low-voltage 12AX7WA tube circuit, which sets it apart from solid-state overdrive designs1.
Videos
fpe
Questions
Does the Guyatone OD-X Overdrive use a real tube?
Yes. The OD-X carries one 12AXWA tube, which Guyatone powers with twelve volts direct to plate. The maker says this low-voltage approach brings out the warm, organic crunch of the tube while accentuating even-order harmonics, so the pedal behaves like an extra gain stage rather than a conventional solid-state overdrive.
What power supply does the Guyatone OD-X need?
The OD-X runs on 12V DC, center negative, and draws 150mA. That is more current than many standard pedal supplies deliver, so it needs a supply rated for 12V output and enough current headroom. It is not a pedal to run from a typical daisy chain.
What does the Contour control do on the OD-X?
The Contour control is a combination Notch/Peaking filter centered on the Mid-Hi frequency range around 1 KHz. It offers plus or minus 12 dB of cut or boost at that band, and at its center position it provides a perfectly flat response, so it can scoop or lift the mids as needed.
Is the Guyatone OD-X analog or digital?
The OD-X is an analog pedal. Its circuit is built around a 12AX7WA tube rather than digital modeling, which is consistent with its design as an additional gain stage that responds to playing dynamics.
Sources (1)
- OD-X Overdrive by Guyatone, RockBoard (PedalPedia), 2026
