The BMF Modular Wah is a wah pedal from BMF Effects built around swappable spec boards: change the board and you change the pedal's voicing, from a classic Italian-style wah to a darker, filter-like sweep. BMF describes the pedal as "throaty and vocal with a wide sweep, delivering classic tones with ease"1. As of 26 October 2026 the pedal was listed as Sold Out on the maker's site, with a current lead time of 10 to 14 days1.
The spec boards
The idea behind the Modular Wah is that the circuit board carrying the wah's voicing can be swapped. BMF Effects lists six spec boards, each with its own sweep and tonal balance1:
| Spec board | Voicing, as described by BMF Effects |
|---|---|
| Derek Spec | Less top end than the Stock Spec with even more low end and a more fluid, almost filter-like sweep; the Eric Clapton / Derek and The Dominos wah |
| Italian Spec | The classic wah sound |
| McClyde Spec | More vocal and a deeper low end than the Italian Spec |
| Ronno Spec | Based on Mick Ronson's wah, a perfect mix of the Italian and McClyde Spec wahs |
| Say Waht? Spec | The best of all the spec boards rolled into one: the high end of the Italian Spec, the throatiness of the Stock Spec, and the sweep of the Derek Spec |
| Stock Spec | Throaty with more low end and a smoother sweep than the classic circuits |
"Ronno Spec - Based on Mick Ronson's wah, a perfect mix of the Italian and McClyde Spec wahs."
For a player, the practical upshot is that one pedal can cover several wah characters: the Italian Spec for the familiar classic sound, the Derek Spec for a darker, more vocal sweep, and the Say Waht? Spec if you want a single board that blends all three approaches1.
Bypass, buffer and fuzz
As with all BMF Effects pedals, the BMF Wah features true bypass switching and a DC jack1. It also carries a switchable onboard buffer, which BMF designed for fuzz compatibility1. That matters because fuzz circuits are famously sensitive to what feeds them, and a buffer ahead of a fuzz can change how it responds. With the buffer switchable, the pedal can be run true bypass or buffered depending on where it sits in a chain that includes a fuzz1.
Power and size
The pedal runs on 9V DC and draws 3mA, with a DC jack for power1. At 3mA it is a light load on any power supply. Its footprint is 4.0 inches wide by 10.0 inches long (101.6mm by 254mm), a full-size wah shape1.
BMF Effects notes that the pedal's color and/or graphics are subject to change1. The pedal was listed as Sold Out as of 26 October 2026, with a stated lead time of 10 to 14 days1.
Questions
What is a spec board in the BMF Modular Wah?
A spec board is a swappable circuit board that sets the wah's voicing. BMF Effects offers six: Derek Spec, Italian Spec, McClyde Spec, Ronno Spec, Say Waht? Spec and Stock Spec. Each gives the pedal a different sweep and tonal balance, from the classic Italian Spec sound to the Derek Spec's darker, filter-like sweep, so one pedal can cover several wah characters.
Is the BMF Modular Wah true bypass?
Yes. BMF Effects states that the BMF Wah features true bypass switching, along with a DC jack for power. The pedal also has a switchable onboard buffer, so you can choose between true bypass and a buffered signal depending on the rest of your board.
Does the BMF Modular Wah work with fuzz?
BMF Effects designed the pedal's switchable onboard buffer with fuzz compatibility in mind. Fuzz circuits often behave badly when fed by a buffered signal, so being able to switch the buffer off, or on as the situation calls for, is intended to let the wah sit well alongside a fuzz pedal.
Which BMF spec board is based on Mick Ronson's wah?
The Ronno Spec board. BMF Effects describes it as based on Mick Ronson's wah, a perfect mix of the Italian and McClyde Spec wahs.
What power does the BMF Modular Wah use?
The BMF Modular Wah runs on 9V DC and draws 3mA, with a DC jack for connection to a power supply. There is no battery option mentioned, so plan a spot for it on your power supply.
How big is the BMF Modular Wah?
BMF Effects lists the pedal at 4.0 inches wide by 10.0 inches long, or 101.6mm by 254mm. That is a full-size wah footprint, so allow room for it and for the rocker pedal's travel on your board.
Sources (1)
- BMF Modular Wah, BMF Effects