Filter / Wah (Expression + envelope controlled twin-T filter / wah) · $248
The Volume and Power QB-1 Expression Pedal / Envelope Controlled Filter is an analog expression + envelope controlled twin-T filter / wah pedal based on the Voltage-controlled twin-T filter (envelope + expression control), with LVL (volume), TRIM (Q start point), HZ (frequency set point), ENV (envelope sensitivity), GAIN controls, made in Switzerland. Features an expression input. From $248.
| Category | Filter / Wah (Expression + envelope controlled twin-T filter / wah) |
| Circuit / based on | Voltage-controlled twin-T filter (envelope + expression control) |
| Signal | Analog |
| Controls | LVL (volume), TRIM (Q start point), HZ (frequency set point), ENV (envelope sensitivity), GAIN |
| Switches | 2 three-position toggles (twin-T filter capacitor values) |
| Expression input | Yes |
| Country of manufacture | Switzerland |
See all Volume and Power pedals →
Closest matches from other makers, by spec and circuit.