What tubes does the Dumble Overdrive Special 50W (1997) - Overdrive use?

The Dumble Overdrive Special 50W (1997) - Overdrive uses 12AX7 preamp tubes and 2× EL34 power tubes.

When was the Dumble Overdrive Special 50W (1997) - Overdrive produced?

The Dumble Overdrive Special 50W (1997) - Overdrive was produced 1997.

Dumble Overdrive Special 50W (1997) - Overdrive preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This is a 1997 Dumble Overdrive Special in its 50-watt form, with a pair of EL34s in fixed bias and a solid-state rectified supply. The 12AX7 clean channel has its own master, and a switched two-stage overdrive section adds Drive, OD Level and OD Trim controls. It shows the smooth, vocal ODS overdrive voiced around EL34 power tubes rather than the 6L6s of larger versions.

Years produced: 1997
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 12AX7
Power tubes: 2× EL34

Tags: american, boutique, hand-wired, el34, two-channel, clean, crunch.

Schematic-derived preset files for the Neural DSP Quad Cortex and 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.