Hiwatt 100W Sta100 preset

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

The Hiwatt STA100 is a 100-watt stage/PA amplifier designed for front-of-house reinforcement in an era before dedicated powered PA systems were commonplace. Built to the same military-grade hand-wired construction standards as the DR103, the STA100 offered touring bands a reliable, high-headroom amplification path for vocals and keyboards as well as guitar. Its exceptionally flat frequency response and low noise floor made it a trusted workhorse on British stages throughout the 1970s, and surviving units remain sought after for their transparent, musical character.

• Years produced: 1970–1980
• Made in: UK
• Wattage: 100W
• Channels: 2
• Preamp tubes: 4× ECC83 (12AX7)
• Power tubes: 4× EL34

Known for: Pete Townshend, Roger Daltrey.

Heard on: Live at Leeds — The Who (1970).

Tags: british, clean, vintage.

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.