Univox LM-6 preset

Close · 76/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The LM-6 is a 1976 Univox tube practice amp. A 12AX7 preamp has volume and tone, plus a 'unidrive' overdrive circuit with its own drive control and footswitch. It drives a single cathode-biased 6V6 on a solid-state bridge rectifier.

• Channels: 1
• Preamp tubes: 1× 12AX7
• Power tubes: 1× 6V6

Tags: 6v6, low-wattage, 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.