What tubes does the Traynor Bassmaster Yba4 use?

The Traynor Bassmaster Yba4 uses 2× 12AX7 preamp tubes and 4× EL34 power tubes.

When was the Traynor Bassmaster Yba4 produced?

The Traynor Bassmaster Yba4 was produced 1969–1975.

Traynor Bassmaster Yba4 preset

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

The Traynor Bass Master YBA-4 is an 80-watt bass head produced by Yorkville Sound in Toronto as the high-powered sibling to the YBA-1. Doubling the EL34 output complement to four tubes gave the YBA-4 considerably more headroom and low-frequency authority, making it well suited to larger venues and louder band contexts. Like all Traynor bass heads of the era, it offered a cost-effective British-flavored alternative to imported Marshall and Hiwatt heads, and its robust construction earned it a reputation for reliability on the Canadian touring circuit.

Years produced: 1969–1975
Made in: Canada
Wattage: 80W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 4× EL34

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.