Sunn 1000S - Bright preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Sunn 1000S is a powerful all-tube bass and guitar head from Sunn's golden-era lineup, delivering massive clean headroom through 6550 power tubes. It became a favorite of bass players seeking enormous, studio-clean power on large stages.

• Years produced: 1968–1975
• Made in: USA
• Wattage: 100W
• Channels: 2
• Preamp tubes: 4× 12AX7
• Power tubes: 4× 6550

Known for: John Paul Jones.

Tags: american, vintage, clean, bass.

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.