What tubes does the Hughes & Kettner Hk Metalmachine use?

The Hughes & Kettner Hk Metalmachine uses 4x ECC83 preamp tubes and 4x EL34 power tubes.

When was the Hughes & Kettner Hk Metalmachine produced?

The Hughes & Kettner Hk Metalmachine was produced 1994–1999.

Hughes & Kettner Hk Metalmachine preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Hughes & Kettner Metal Machine is a high-gain head engineered for modern heavy metal tones, featuring tightly voiced cascaded gain stages for saturated distortion with articulate note definition. Its EL34 power section adds body to palm-muted riffs without flabbiness. The Metal Machine was a European club favorite during the thrash and groove metal era.

Years produced: 1994–1999
Made in: Germany
Wattage: 100W
Channels: 2
Preamp tubes: 4x ECC83
Power tubes: 4x EL34

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.