Traynor Yba 1A Bass Master preset

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

The Traynor YBA-1A Bass Master Mk II is an updated version of the iconic YBA-1, with minor circuit refinements that retained the same aggressive midrange and touch-sensitive breakup. It remained a staple of the Canadian music scene throughout the early 1970s and continues to be sought after by boutique amp fans.

• Years produced: 1968–1975
• Made in: Canada
• Wattage: 45W
• Channels: 2
• Preamp tubes: 2× 12AX7
• Power tubes: 2× 6CA4

Known for: The Band.

Tags: vintage, crunch.

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.