Harmony H-440 - Channel 1 preset

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

The Harmony H-440 is the big amp of the Harmony line, built by Valco as a preamp chassis plugged into a power pack. Channel 1 has high and low inputs with its own volume and tone; channel 2 has guitar and accordion inputs with volume, tone and spring reverb (6DR7 driver, 6EU7 recovery). A 12AX7 tremolo has speed and intensity. Four 6L6s on two 5U4 rectifiers drive two output transformers and speakers. Clean, loud and full.

• Made in: USA
• Channels: 2
• Preamp tubes: 4× 12AX7, 1× 6EU7, 1× 6DR7
• Power tubes: 4× 6L6

Tags: american, vintage, two-channel.

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.