Hughes & Kettner Attax 40/50 - Lead preset

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

The Attax 40/50 is a solid-state Hughes & Kettner combo from the early-1990s Attax line, with no tubes. A TL072 op-amp preamp offers a Clean channel with its own volume and a Lead channel with gain, diode clipping and a lead master, footswitchable. Both share treble, middle and bass, followed by spring reverb, line in and out, a headphone jack and a master volume, into a discrete transistor power stage. A compact practice and small-gig amp.

Tags: german, solid-state, mid-wattage, two-channel, reverb, practice.

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.