Tube OD
The B.K. Butler Tube Driver is a legendary overdrive pedal known for its warm, dynamic tone and real 12AX7 vacuum tube circuitry. Favored by guitarists like David Gilmour and Eric Johnson, it delivers smooth, amp-like overdrive with responsive touch sensitivity and a wide range of gain, from subtle boost to saturated distortion. Its transparent character preserves the guitar’s natural sound, making it highly versatile for both studio and live use.
Fender Model Guide
Produces smooth sustain, rich harmonics and tube-like compression. Extensive controls deliver tones ranging from subtle warmth to saturated lead sounds.
- DRIVE Adjusts amount of distortion generated by virtual tube stage.
- LEVEL Adjusts overall output level.
- HIGH Adjusts tone of higher frequencies.
- LOW Adjusts tone of lower frequencies.
- BIAS Adjusts virtual tube bias voltage, which helps tailor amount of asymmetric clipping in tube stage.
- TUBE SWITCH Select 12AT7 for slightly more gain and smoother, earlier breakup than 12AX7.
From the Fender Tone Master Pro Model Guide
- Based on
- B.K. Butler Tube Driver
- Effect type
- Overdrive
- Real gear released
- 1986
Unofficial fan reference by Worship Calling. Not affiliated with or endorsed by Fender. Tone Master Pro is a trademark of Fender Musical Instruments Corporation. Other product names belong to their owners and are used only to identify the gear each model is based on. Details are a guide, so check the Fender manual for exact controls.