Heathkit EA-3 preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The EA-3 is a Heathkit 14-watt integrated hi-fi amplifier kit, not a guitar amp. A 12AX7 phono/preamp and 6AU6 stage feed a 6AN8 voltage amplifier and split-load inverter driving a push-pull pair of EL84s, with an EZ81 rectifier. A compact, clean EL84 amplifier.

• Made in: USA
• Wattage: 14W
• Channels: 1
• Preamp tubes: 1× 12AX7, 1× 6AU6, 1× 6AN8
• Power tubes: 2× EL84

Tags: american, vintage, clean, el84, low-wattage, diy.

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.