EICO HF-12A preset

Verified · 91/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The HF-12A is EICO's later 14 W revision of the HF-12 integrated hi-fi amplifier. It keeps the same layout of three 12AX7s for preamp, tone and phase inverter feeding two EL84s on an EZ81 rectifier, and like the HF-12 is a common basis for guitar-amp conversions.

• Made in: USA
• Wattage: 14W
• Channels: 1
• Preamp tubes: 3× 12AX7
• Power tubes: 2× EL84

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

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.