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This preamp is based on the Dumble Overdrive Special model... The clean channel's volume control stays on when the overdrive is activated. Unlike conventional channel-switching amplifiers, however, the Overdrive Special does not have a proper lead channel, but rather an Overdrive mode with an extra preamp tube and two additional triodes of gain following the amp's standard preamp circuit, effectively creating a cascading-gain preamp with four gain stages. It is possible to describe the overdrive as a "thick, creamy, rich, yet clear and articulate lead tone that is also extremely dynamic and tactile.

Tone: Thick, smooth, rich overdrive with incredible clarity and note definition; exceptionally dynamic and touch-sensitive; amazing clean tones with huge sustain.
Responsiveness: Responds dynamically to playing intensity, allowing for a vast range of expression from clean to full saturation.
Versatility: Handles blues, jazz, rock, and even metal well.

Tech:

• All analog signal path

• Two tubes 12AX7 Electro-Harmonics running at high anode voltage (400v)

• 120v or 230v transformer version at your choice depending on your location

• WIMA capacitors

• "Treble", "Middle", "Bass", "Volume" tone stack

• "Bright" (to add a brightness boost)

• "Deep" (to change the tone section voicing from a midrange-scoop with extended bass to a mid-push and bass cut)

• "Rock" / "Jazz" (with Rock having a brighter character and increased picking dynamics and Jazz being mellower with less gain)

• Trim, Level and Ratio knobs control the overdrive mode's output and how much overdrive is fed back into the circuit, respectively

• Tube main output (high impedance)

• Line Output (low impedance) combined with Cabinet Simulated output (low impedance). The cab sim out is engaged by plugging in halfway on the Line Output Record Jack. Plugged all the way in is just a line out, no cab sim.

• "Cold" bypass

• Plastic ABS enclosure

• 5,12 inch x 7,1 inch (13cm x 18cm)

Usually it takes a week to be sent.

Please contact me before buying.