What tubes does the Sunn Sentura Ii use?

The Sunn Sentura Ii uses 4× 12AX7 preamp tubes and 4× 6550 power tubes.

When was the Sunn Sentura Ii produced?

The Sunn Sentura Ii was produced 1968–1972.

Sunn Sentura Ii preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Sunn Sentura II is a 100-watt tube head and a close sibling to the 100S, representing Sunn's professional mid-tier. It features the same 6550-based power stage that defines the classic Sunn clean tone.

Years produced: 1968–1972
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 4× 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.