EICO HF-12 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The HF-12 is an EICO integrated hi-fi amplifier, widely sold as a kit, rated at 12 W. Three 12AX7s handle the phono/tape preamp, volume and tone, and the cathode-coupled phase inverter driving a push-pull pair of EL84s on an EZ81 rectifier. Its compact EL84 output stage makes it a popular starting point for guitar-amp conversions.

• Made in: USA
• Wattage: 12W
• 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.