What tubes does the Sunn Sentura I - Normal use?

The Sunn Sentura I - Normal uses 3× 12AX7 preamp tubes and 4× 6550 power tubes.

When was the Sunn Sentura I - Normal produced?

The Sunn Sentura I - Normal was produced 1967–1970.

Sunn Sentura I - Normal preset

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

The Sunn Sentura I is an early production tube head from Sunn's foundational lineup, featuring 6550 power tubes for clean, authoritative output. It established many of the sonic and aesthetic hallmarks that would define the Sunn brand throughout the late 1960s.

Years produced: 1967–1970
Made in: USA
Wattage: 60W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6550

Tags: american, vintage, clean.

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.