Ampeg SS-140C - Channel A preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg SS-140C is a late-1980s stereo solid-state guitar combo with two power amps. Channel A has gain, level, low and high controls; channel B adds a mid control and a bright boost, with JFET switching between them from a footswitch. Spring reverb and a separate chorus board feed left and right power amps built on complementary MJ15001/MJ15002 output pairs, with stereo XLR line outputs and footswitches for channel, reverb and chorus.

• Wattage: 140W
• Channels: 2

Tags: american, solid-state, stereo, two-channel, 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.