What tubes does the Traynor Bassmaster Yba1A use?

The Traynor Bassmaster Yba1A uses 2× 12AX7 preamp tubes and 2× EL34 power tubes.

When was the Traynor Bassmaster Yba1A produced?

The Traynor Bassmaster Yba1A was produced 1967–1974.

Who famously used the Traynor Bassmaster Yba1A?

Geddy Lee are among the notable players associated with the Traynor Bassmaster Yba1A.

Traynor Bassmaster Yba1A preset

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

The Traynor Bass Master YBA-1A is a revised variant of Traynor's flagship bass head, retaining the EL34 power section and the tight, punchy low-end response that made the original a Canadian institution. Built by Yorkville Sound in Toronto, the YBA-1A series incorporated minor circuit refinements over production runs while preserving the essential character: a muscular midrange, controlled bass, and an ability to push into harmonic overdrive at high volumes. Like the original, it saw extensive service in Canadian clubs and recording studios and is now sought after by players looking for an affordable vintage EL34 head that can double as a guitar amplifier.

Years produced: 1967–1974
Made in: Canada
Wattage: 45W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 2× EL34

Known for: Geddy Lee.

Tags: british, vintage.

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.