Crate BlueVoodoo 50 - Gain preset

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

The BlueVoodoo BV-50H is the 50-watt head of Crate's BlueVoodoo tube line, built to bring high-gain valve tone to a working-musician price. Two 12AX7s run a clean path and a gain path with its own gain, volume and three-band EQ, switched by optocouplers. Op-amp stages drive the spring reverb and effects loop, and a third 12AX7 long-tail phase inverter with presence in the feedback loop drives two 6L6s on a solid-state rectifier, with a line out.

• Made in: USA
• Wattage: 50W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× 6L6GC

Tags: american, high-gain, mid-wattage, two-channel.

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.