Hughes & Kettner Access preset

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

The Hughes & Kettner Access is a programmable early-1990s rack guitar preamp, run by a microprocessor with a plug-in sound module. A low-noise op-amp and FET input feeds three switchable paths: Clean and two tube paths, Tube 1 and Tube 2, each built on a twin triode. CMOS switches select the path and treble and mid boosts, and gain, master and EQ are stored in presets. It has an effects loop, a noise reducer and a balanced output.

• Introduced: 1991
• Made in: Germany
• Channels: 1

Tags: german, preamp, modern.

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.