Harmony H-415 - Channel 1 preset

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

The H-415 is a Harmony combo with two channels: four inputs, two per channel, each pair on its own triode with its own tone and volume controls. A further triode adds gain and a second works as a paraphase inverter for a cathode-biased push-pull pair of output pentodes, with a full-wave valve rectifier. A pentode phase-shift oscillator modulates the output bias for tremolo, with speed and intensity controls and a footswitch jack.

• Made in: USA
• Wattage: 20W
• Channels: 2
• Preamp tubes: 2× 12AX7

Tags: american, vintage, clean, tremolo, 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.