Watkins Dominator 20/T - Tremolo preset

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

The Dominator 20/T is the wedge-shaped Watkins combo in its two-channel tremolo form. The Normal channel uses an ECC83 with its own Tone and Volume; the Tremolo channel has an ECC83 gain stage and an ECC83 phase-shift oscillator with Intensity, Speed and an on/off footswitch, plus its own Tone and Volume. An ECC83 long-tailed pair drives two cathode-biased EL84s with no negative feedback, on an EZ81 rectifier.

• Made in: UK
• Wattage: 17W
• Channels: 2
• Preamp tubes: 3× ECC83
• Power tubes: 2× EL84

Tags: british, vintage, el84, tremolo, mid-wattage, two-channel.

Schematic-derived preset files for 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.