The MOSFET Driver is based on the legendary BK Butler Tube Driver. A pair of adjustable-bias MOSFET gain stages take the place of the 12AX7 vacuum tube, otherwise the circuit is true to the original schematic.
- Hi – Adjusts the treble content
- Lo – Adjusts the bass content
- Drive – Controls the amount of gain
- Volume – Controls the overall output volume
- Designed for a 125B enclosure with top-mounted jacks