Harmony H-191 preset

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

The H-191 is a small 1950 Harmony combo with two inputs and a single volume control. A 6SJ7 pentode preamp drives a single-ended 6V6 with a 5Y3GT rectifier, for about 4 watts. It is a simple class-A student amp that breaks up quickly.

• Made in: USA
• Wattage: 4W
• Channels: 1
• Preamp tubes: 1× 6SJ7
• Power tubes: 1× 6V6

Tags: american, vintage, 6v6, class-a, low-wattage, breakup.

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.