Bogen DB20 preset

Close · 65/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The DB20 is a Bogen tube hi-fi integrated amplifier, not a guitar amp. A selector picks magnetic phono, tape or TV sound, with switched equalisation. Three 12AT7s handle the preamp, tone and loudness-contour stages, and a 12AU7 long-tail phase inverter drives a push-pull pair of cathode-biased 6L6Gs with negative feedback, on a 5U4G rectifier, for about 20 watts.

• Made in: USA
• Wattage: 20W
• Channels: 1
• Preamp tubes: 3× 12AT7, 1× 12AU7
• Power tubes: 2× 6L6G

Tags: american, vintage, 6l6, mid-wattage, clean.

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.