The TBO-9 combines Clean Boost and Overdrive capabilities to create a versatile tone-shaping tool.

The ideal complement to non-master volume tube amps, the TBO allows you to drive a clean or semi-clean amp to the breaking point, giving it that "on 10" tonality at a much lower volume level and without altering the amp's signature tone.

The TBO-9's tube stage is controlled by the Boost knob which adds a fat, warm bottom end with a slight mid bump as it increases the output level.

The Drive knob blends clean and distorted signals, allowing the user to dial in a small amount of grit with minimal coloration.

The TBO-9 features internal voltage doublers that bump the incoming 9 VDC up to 30 VDC for massive headroom and maximum transparency.

When you need to drive your amp without driving the audience towards the door, the TBO-9 does the job without commanding the center stage.

- Clean Booster/Overdrive pedal with Tube gain stage

- Employs mil-spec sub-miniature vacuum tube

- Great as a tube amp booster to add warmth

- Boost knob controls level of tube gain

- Dual-purpose Drive control with clean blend function

- Internal voltage regulator runs 30 Volts to tube

- Heater In-rush current control warms tube upon power-up

- True Bypass Switching