JAM Pedals Wahcko MK2

Since 2008, the Wahcko has been one of the defining pedals in the JAM pedals line, renowned for its expressive sweep, immediate feel, and dynamic response to the player, instrument, and amplifier.

Over the years, it has found its way onto the pedalboards of artists including Nile Rodgers, Bill Frisell, John Scofield, Steve Lukather, Richie Sambora, and Greg Koch.

With the Wahcko mk.2, we revisited the original design in detail, refining it further to expand its expressive range while giving players greater control over its response.

At its heart is a custom JAM inductor inspired by the vintage TDK inductors found in classic 1960s Cry Baby and Vox wah circuits.

The familiar six-position SWEEP control remains, allowing you to tailor the pedal’s frequency range to your instrument, amplifier, and playing style. The original model’s internal input-gain trimmer has also been retained, while the mk.2 introduces an internal Q trimmer for finer control over the character and intensity of the wah response. Battery operation also makes its return.

For the first time, internal DIP switches allow the Wahcko to be configured for either guitar or bass. This extends its expressive sweep to lower-register instruments while preserving the feel and musicality that have defined the Wahcko from the beginning.

CONTROLS

• Six-position SWEEP rotary switch for selecting among six distinct frequency ranges
• Internal Q trimmer for adjusting the character and intensity of the wah response (default position~12:00)
• Internal input-gain trimmer (default position~12:00)
• Internal DIP switches for selecting guitar or bass mode

ROCKER-TENSION ADJUSTMENT

The resistance of the rocker can be adjusted using the included 4 mm Allen key.

Keeping the rocker fully pressed down in the toe position, insert the long end of the Allen key into the adjustment screw located at the rear of the rocker’s underside.

• Turn clockwise to increase resistance.
• Turn counter-clockwise to reduce resistance.

If there is not enough clearance to insert the Allen key directly, introduce it at a slight angle.

If necessary, tap it very lightly into position with a hammer. Take care not to use excessive force, as this may damage the pedal’s finish or mechanism. Make small adjustments and check the rocker’s movement after each turn.