Bogen J-15 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bogen J-15 is a 15-watt tube PA amplifier with two identical 6SF5 microphone preamps (volume only) and a phono input, plus shared bass and treble controls. A 6SL7 phase inverter drives a push-pull pair of 6L6G output tubes. It is a simple octal-tube amp with one voice.

• Made in: USA
• Wattage: 15W
• Channels: 1
• Preamp tubes: 3× 6SF5, 1× 6SL7GT
• Power tubes: 2× 6L6G

Tags: american, vintage, 6l6, 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.