What tubes does the Harmony H-415 use?

The Harmony H-415 uses 12AX7 preamp tubes and 6L6 power tubes.

When was the Harmony H-415 produced?

The Harmony H-415 was produced 1963–1968.

Harmony H-415 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Harmony 415 is a combo amplifier from the mid-1960s in the upper tier of Harmony's electric guitar amplifier lineup. It features a two-channel layout with tremolo, delivering the warm, slightly soft clean tones associated with budget Chicago-made amplifiers of the era. The 415 is representative of the Harmony catalog during the peak of the American budget guitar and amplifier market.

Years produced: 1963–1968
Made in: USA
Wattage: 18W
Channels: 2
Preamp tubes: 12AX7
Power tubes: 6L6

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.