Magnatone 280-A - Channel 1 preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Magnatone 280-A is a large two-channel vibrato amp, each channel with its own treble, bass and volume. 12AX7 preamp stages, 6CG7 vibrato and driver stages and a 12BH7 feed four 6973 output tubes, with a 5U4GB rectifier. It features Magnatone's patented pitch-shifting vibrato with a Stereo/Normal footswitch, giving a lush, swirling true vibrato over a clean, full tone.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 12AX7, 3× 6CG7, 1× 12BH7
• Power tubes: 4× 6973

Known for: Buddy Holly, Neil Young.

Tags: american, vintage, vibrato, stereo, two-channel, clean.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.