Fender Bassman 135 - Normal preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bassman 135 is a late-1970s Fender tube bass head rated at 135 watts RMS, a more powerful successor to the silverface Bassman 100. Bass and Normal channels each have treble, middle and bass controls, with a Deep switch on the Bass channel and a Bright switch on Normal, followed by a master volume. Two 7025s and a 12AT7 inverter drive four 6L6GCs through an ultra-linear output transformer, and a line/recording output is on the back.

Tags: american, vintage, silverface, bass, 6l6, high-wattage.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.