SWR Basic Black preset

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

The Basic Black is an early SWR bass combo built around a 12AX7 tube preamp and a transistor power amp. Gain, Aural Enhancer, bass/mid/treble, effects blend and master give it SWR's clean, punchy studio-style voice in a single, gig-ready cabinet.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 12AX7

Tags: american, bass, hybrid, clean.

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.