Bogen H50 / HL50 / H2L50 preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bogen H50 series is a 50-watt tube public-address amplifier from around 1949. Two mic inputs each run through both halves of a 6SC7 with their own volume, and a phono input has its own volume; they mix into a third 6SC7 stage and tone control. A 6SL7 amplifies and splits the phase, and a push-pull 6SN7 driver feeds an interstage transformer driving two 807s, with separate 5Y3GT and 5R4GY rectifiers.

• Made in: USA
• Wattage: 50W
• Channels: 1
• Preamp tubes: 3× 6SC7, 1× 6SL7GT, 1× 6SN7GT
• Power tubes: 2× 807

Tags: american, vintage, 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.