Heathkit AA-13 preset

Verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The AA-13 is a Heathkit hi-fi amplifier kit, not a guitar amp. It is a 14-watt mono tube amplifier with a 6EU7 and 6AU6 preamp, a 6AN8 serving as voltage amp and split-load phase inverter, a push-pull pair of EL84s and an EZ81 rectifier. Its small EL84 output stage gives a clean, sweet low-power voice.

• Made in: USA
• Wattage: 14W
• Channels: 1
• Preamp tubes: 1× 6EU7, 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.