JAM Pedals - Wahcko mk.2 Wah Pedal
The Wahcko mk.2 is an expressive wah pedal for guitar and bass, with six selectable frequency ranges and adjustable wah character to suit your instrument, rig and playing style.
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The Nantel Verdict
The Nantel Verdict
Six selectable frequency ranges for tonal sculpting; adjustable wah character parameter allows customization of resonance peak and sweep behavior; responsive expression curve suited to both guitar and bass; solid construction typical of JAM's boutique engineering; operates on standard 9V.
Requires standard expression pedal footswear and 9V power supply. The six modes invite experimentation—expect a learning curve to find your preferred settings. Pairs well with overdrive or fuzz for extended sonic possibilities. No batteries, so pedalboard integration assumes power infrastructure.
The Wahcko mk.2 justifies its price through genuine tonal flexibility and responsive design. Players who want wah as a nuanced texture rather than a novelty will find the frequency selection and character control rewarding enough to become a cornerstone of their sound.
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Wahcko
The Wahcko mk.2 is an expressive wah pedal for guitar and bass, with six selectable frequency ranges and adjustable wah character to suit your instrument, rig and playing style.
A favourite in our line since 2008 used by the likes of Nile Rodgers, Mick Thomson, Mateus Asato and more, the Wahcko returns with a custom JAM inductor inspired by vintage TDK designs, a new internal Q control, selectable guitar and bass modes, and a newly designed custom rubber tread. The familiar six-position SWEEP and internal input-gain trimmer remain, while 9V battery operation makes its return. From the frequency range and intensity of the wah to the resistance and feel under your foot, the mk.2 gives you more ways to find a response that feels right.
Custom JAM inductor
At the heart of the Wahcko mk.2 is our custom inductor, inspired by the vintage TDK inductors found in classic 1960s Cry Baby and Vox wah circuits.
Six-position SWEEP
Choose from six distinct frequency ranges using the side-mounted rotary switch. Tailor the sweep to your instrument, amplifier and playing style, or explore a different range without changing the rest of your setup.
Q and input-gain adjustment
The new internal Q trimmer adjusts the character and intensity of the wah response, giving you another way to shape the sound alongside the SWEEP control. The original Wahcko’s internal input-gain trimmer is also retained. Both trimmers default to approximately 12 o’clock.
Guitar and bass modes
Internal DIP switches configure the Wahcko mk.2 for guitar or bass. Bass mode extends its expressive sweep to lower-register instruments while preserving the feel and musicality of the original design.
Adjustable rocker tension
Set the rocker’s resistance to your preference using the included 4 mm Allen key. Choose a lighter movement or a firmer feel under your foot.
Part of the family since 2008
Over the years, the Wahcko has found its way onto the pedalboards of Nile Rodgers, Bill Frisell, John Scofield, Steve Lukather, Richie Sambora and Greg Koch. The mk.2 builds on that history with an expanded expressive range and greater control over its response.
| Bypass | true bypass |
| Frequency selection | six-position SWEEP rotary switch |
| Internal controls | Q and input-gain trimmers |
| Instrument modes | guitar or bass, selected via internal DIP switches |
| Power supply | 9V DC adaptor, centre-negative |
| Battery operation | 9V battery |
| Current draw | 10 mA |
| Dimensions including jacks and controls | 25.7 × 12.5 × 7 cm / 10 × 4.9 × 2.7 in |
| Weight | 1.7 kg / 3.7 lb |
| Input impedance | approximately 70 kΩ |
| Output impedance | approximately 10 kΩ |
| Included accessory | 4 mm Allen key for rocker-tension adjustment |
JAM Pedals is a boutique effects manufacturer based in Greece, known for crafting hand-wired pedals with meticulous attention to tone and playability. The company has built a reputation for combining classic pedal design principles with modern innovations, resulting in instruments favored by professional and discerning musicians worldwide.
JAM Pedals' signature approach emphasizes versatility and expressive control, allowing players to shape their sound with precision. Each pedal is engineered to integrate seamlessly into diverse rigs, from vintage-inspired setups to contemporary digital systems.
