What tubes does the Harmony H506 use?

The Harmony H506 uses 12AX7 preamp tubes and 6L6 power tubes.

When was the Harmony H506 produced?

The Harmony H506 was produced 1966–1971.

Harmony H506 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Harmony H506 is a late-1960s combo that includes onboard reverb alongside tremolo, representing Harmony's response to the dominant Fender feature set of the era. The reverb-equipped models were positioned at the higher end of the Harmony range and aimed at players who wanted a complete package without purchasing additional effects units. The H506 delivers the characteristic Harmony warm clean tone with a lush spring reverb wash.

Years produced: 1966–1971
Made in: USA
Wattage: 35W
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.