Fender Pro Amp 5B5 - Microphone preset

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

The 5B5 is an early-1950s TV-front tweed Pro Amp, a 1×15 combo with Instrument and Microphone channels. Each channel has two inputs and its own volume, and there is a shared tone control. Two 6SC7 dual triodes handle the preamp, and a third 6SC7 works as a paraphase inverter. They drive a push-pull pair of 6L6s on a 5U4 rectifier. The tone is warm and round and compresses when pushed.

• Made in: USA
• Channels: 2
• Preamp tubes: 3× 6SC7
• Power tubes: 2× 6L6

Tags: american, tweed, vintage, 6l6, breakup.

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.