The Morley 20/20 Wah Boost is a switchless, optical wah pedal with a built-in 20 dB clean boost, made by Morley. Instead of a mechanical pot that wears out, the treadle controls a light and an optical sensor, and there is no footswitch: you step on the treadle to engage the wah and return it to the heel position to disengage. Morley calls it "one of our classic circuits on steroids"1.
The boost is the pedal's distinguishing feature. Morley says the 20 dB clean boost "helps you level out in the mix or ascend into guitar greatness," and the maker describes the wah's character as a wide sweep with mid-range focus that "will cut through the heaviest of mixes"1. When it launched in 2019, Gearnews reported that it lets you dial in up to +20 dB of clean boost2.
How the wah and boost work
The 20/20 Wah Boost is part of Morley's 20/20 line, announced in 2019 as a set of compact wahs built around the company's switchless, optical design. The optical system means the treadle position is read by light rather than by a mechanical potentiometer, and Morley's 20/20 switchless models are described by the maker as having "smooth and easy Switchless activation"52. Because there is no switch, the effect simply follows your foot.
The boost is not a separate effect with its own footswitch. On the sibling 20/20 Lead Wah Boost, Morley states plainly how the two functions interact6:
"Wah and Boost Activate Simultaneously when Engaged. Simply step on to activate."6
The same principle applies across the boosted 20/20 wahs: the boost rides with the wah rather than standing alone. Morley's press release for the line described the Power Wah models as having "a 20db Wah Boost control"37, and on the 20/20 Power Wah that control is a knob that "allows up to 20 db of clean boost in Wah mode"8.
Other features from the maker's page include:
- MQ2 custom inductor
- LED indication
- Cold-rolled steel housing
- Quick clip battery door
- Glow-in-the-dark treadle grip1
Power and connections
The pedal runs on one 9-volt battery or an optional Morley 9V adapter, and Morley says it is compatible with most 9V adapters, so a typical 9V pedalboard supply will power it1. The quick clip battery door makes battery changes straightforward without tools1. There is no stated current draw, so if you run a tightly budgeted isolated supply, the battery option is the maker's fallback.
The 20/20 Wah Boost takes a standard 9V battery, unlike many compact digital pedals that are adapter-only. Morley rates it as compatible with most 9V adapters, so polarity and voltage match common pedalboard supplies1.
How it differs from the other 20/20 wahs
Morley's 20/20 line includes several wahs with boost, and the differences are mostly in what else the pedal does9.
| Model | What it adds over a basic wah |
|---|---|
| 20/20 Wah Boost | Switchless optical wah with 20 dB boost and the 20/20 buffer circuit1 |
| 20/20 Power Wah | Boost knob allowing up to 20 dB of clean boost in wah mode; silent switching8 |
| 20/20 Power Wah Volume | Same boost control plus a smooth audio volume taper, so it doubles as a volume pedal10 |
| 20/20 Lead Wah Boost | Same family of tones as the Lead Wah and Wah Boost; wah and boost activate simultaneously6 |
| 20/20 Lead Wah | Wider frequency sweep, low-end boost and an internal wah level trim pot11 |
The Power Wah Volume is the most versatile of the group: Morley describes it as "the classic Morley Power Wah with it's vintage tone, wide sweep and 20 db clean boost and a smooth audio volume" taper10. The Wah Boost is the simpler proposition, a wah with the boost built in and a buffer circuit that Morley says "prevents signal loss and maintains tone"1.
One related model is gone: Morley states that the MTPDW 20/20 Distortion Wah "is discontinued and no longer available." That pedal put a redesigned PDW Distortion circuit after the wah circuit for a traditional combined tone12.
What reviewers said
Premier Guitar reviewed the 20/20 Wah Boost in June 2023, testing it with a Fender Jazzmaster and a Fender Telecaster through a blackface Fender Vibrolux and a Fender VibroChamp4. The reviewer's overall verdict:
"Still, it is a potent and expressive filtering machine."4
The review noted two limitations alongside that praise: the spring-loaded treadle "makes holding fixed wah positions difficult," which matters if you like parked-wah sounds, and the boost lacks an independent switch, so it cannot be used apart from the wah4. For players who want a wah that snaps on and off with the foot and a boost that pushes solos forward in the same motion, those trade-offs are the design working as intended; for players who want a standalone boost or a parked filter, they are real constraints.
Videos
Sweetwater
Morley
Johnny Bernhard
News
Questions
How does a switchless wah turn on and off?
There is no footswitch to click. A switchless wah like the 20/20 series engages when you step on the treadle and disengages when you return it to the heel position, so the effect follows your foot without an extra stomp. Morley describes the activation on its 20/20 switchless models as smooth and easy.
Can you use the boost without the wah on the Morley 20/20?
No. On the 20/20 Wah Boost the boost is part of the wah circuit rather than a separate effect with its own footswitch, so it works with the wah. On the sibling 20/20 Lead Wah Boost, Morley states that the wah and boost activate simultaneously when the treadle is engaged.
Does the Morley 20/20 Wah Boost take a battery?
Yes. It is powered by one 9-volt battery or an optional Morley 9V adapter, and Morley says it is compatible with most 9V adapters, so a standard pedalboard power supply works. The housing has a quick clip battery door for easy changes.
Is the Morley 20/20 Distortion Wah discontinued?
Yes. Morley states that the MTPDW 20/20 Distortion Wah is discontinued and no longer available. It was a redesigned version of the classic PDW Distortion circuit with more gain and a new tone circuit, with the distortion placed after the wah.
What is the difference between the 20/20 Wah Boost and the 20/20 Power Wah?
The 20/20 Wah Boost is a switchless optical wah whose 20 dB boost is built into the wah itself. The 20/20 Power Wah has a Boost knob that adds up to 20 dB of clean boost in wah mode, and the Power Wah Volume version adds a smooth audio volume taper, so it works as a volume pedal too.
Sources (12)
- 20/20 Wah Boost, Morley
- Morley adds new 20/20 pedals: Wah Lock, Wah Boost and Lead Wah, gearnews.com, 2019-11-07
- Next 20/20 Pedals Press Release, Morley, 2019-11
- Boost Your Filter Sweeps with a Compact Wah Pedal, Premier Guitar, 2020-04-16
- 20/20 Classic Switchless Wah, Morley
- 20/20 Lead Wah Boost, Morley
- 20/20 Pedals Press Release, Morley, 2019-08
- 20/20 Power Wah, Morley
- NAMM 2020 Video: Morley introduces three new Wahs for its 20/20 range | Guitar.com, Guitar.com
- 20/20 Power Wah Volume, Morley
- Morley extends its 20/20 vision with 4 tricked-out wah pedals, Guitar World, 2019-11-19
- 20/20 Distortion Wah, Morley









