Magnatone 411 preset

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

The Magnatone 411 is a small 1960s practice amp from the Estey-era line. High and low inputs feed a Volume control ahead of a 6AV6 triode preamp, followed by a Tone control. A single 6GW8/ECL86 does double duty: its triode half is the tremolo oscillator with an Intensity control and footswitch, and its pentode half is a cathode-biased single-ended output into an 8-inch speaker. A solid-state full-wave rectifier powers it.

Tags: american, vintage, tremolo, class-a, 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.