The Wilson Effects Gray Clone is a wah pedal built as a faithful recreation of the Vox 250mh, the gray wah from the late 1960s. Wilson Effects describes it as delivering "Late 60's vintage tone!" and notes it is "the same model played by Jimmy Page in early Led Zeppelin years"1. The pedal began as a custom build that gained demand, leading to its public release1.
The Gray Clone carried a list price of $225.00 USD on the Wilson Effects site as of 2026-10-261.
Controls and trimmers
The Gray Clone keeps its external footprint simple and puts its voicing options in internal trimmers, so you can set the pedal's character once and leave it alone:
| Control | What it does |
|---|---|
| Growl trimmer | Adds bass and gain to the circuit if desired, or eliminates it2 |
| Mid-Range trimmer | Adjusts the amount of mid-range in the sweep of the wah2 |
| Sweep Range Trimmer | Controls the width and depth of the sweep1 |
Circuit and components
Wilson Effects specifies period-appropriate parts in the signal path:
- BC109B transistors for true-to-original performance12
- Carbon composition resistors for classic warmth and response1
- A fuzz-friendly output buffer that Wilson Effects says works great with fuzz and overdrive pedals1
The fuzz-friendly buffer matters for players who run a fuzz before their wah, a combination that can misbehave with some wah designs1.
Power, bypass and connections
The pedal runs on a 9V battery or a standard Boss-style center-negative power supply1, so it fits into a normal pedalboard power setup. Bypass is true bypass switching, with no LED by default, though an LED can be added1. Input and output jacks are Neutrik, which Wilson Effects describes as reliable and durable connections1.
Origin and warranty
Wilson Effects says the Gray Clone was originally designed for Andy Martin, of Reverb and Tone Report fame1. What started as a custom build quickly gained demand, leading to its public release1. All Wilson Effects pedals, including the Gray Clone, are backed by a one-year warranty on parts and labor12.
Wilson Effects builds a range of wah designs alongside the Gray Clone, including the Wilson Wah V2, the Clyde Signature Wah and the Freaker Wah V2.
Videos
Wilson Effects
Questions
Does the Wilson Effects Grey Clone run on a battery?
Yes. Wilson Effects says the Grey Clone runs on a 9V battery or a standard Boss-style center-negative power supply, so it works with a typical pedalboard power brick or daisy-chain supply as well as a battery.
Is the Grey Clone true bypass?
Yes. The Grey Clone uses true bypass switching. By default it ships with no LED indicator, but Wilson Effects says an LED can be added if you want one.
Does the Grey Clone have an LED?
Not by default. The pedal uses true bypass switching with no LED as standard, though Wilson Effects notes an LED can be added. Players who want an indicator light can have one fitted.
What do the Growl and Mid-Range trimmers do?
The Growl trimmer adds bass and gain to the circuit if desired, or eliminates it. The Mid-Range trimmer adjusts the amount of mid-range in the sweep of the wah. Both are internal controls that let you shape the pedal's voice to taste.
Who designed the Wilson Effects Grey Clone originally?
Wilson Effects says the Grey Clone was originally designed for Andy Martin, known for his work with Reverb and Tone Report. What started as a custom build gained demand and led to its public release.
Sources (2)
- Grey Clone Vintage Wah Pedal, Wilson Effects
- Grey Clone, Wilson Effects
