The CKK Electronic Q Cat is an analog envelope filter pedal for electric guitar. An envelope filter opens and closes a filter automatically in response to your picking, and the Q Cat's maker describes its voice as similar to a wah pedal, using adjustable frequencies to open and close that filter. The practical upshot for a player is a wah-like sweep that reacts to how hard you play, with no pedal to rock. CKK Electronic positions it as a great pedal for funk and jazz players, or for those wanting a wah-sounding pedal without having to adjust one manually1. For where it sits among filter effects, see Filter Pedals, and for the foot-operated alternative, see Wah-Wah Pedals.
Controls
The Q Cat keeps things simple: three knobs, each shaping a different part of the filter's response1.
| Control | What it does |
|---|---|
| Resonance | Sets the sharpness of the filter's peak |
| Sensitivity | Sets how strongly your picking opens the filter |
| Frequency | Sets the frequencies the filter works around |
Together, the resonance, sensitivity and frequency knobs allow precise control over the effect's sharpness1.
Power and setup
The pedal runs on 9V DC, center negative, and draws 20mA1, so it fits a standard pedalboard supply. It is an analog circuit1.
Videos
Pete Thorn
Brett Kingman
Mike Hermans
Questions
What does an envelope filter pedal do?
An envelope filter listens to how hard you pick and opens and closes a filter in response, sweeping the tone automatically as you play. The Q Cat has a voice similar to a wah pedal, so it suits funk and jazz players, or anyone who wants a wah-like sound without having to move a pedal by hand.
Is the CKK Electronic Q Cat analog or digital?
The Q Cat is an analog pedal. It runs on 9V DC center-negative power and draws 20mA, so it fits a standard pedalboard power supply.
Sources (1)
- Q Cat by Ckk Electronic, RockBoard PedalPedia, 2026