What tubes does the Yorkville Sound Mono Block II use?

The Yorkville Sound Mono Block II uses 2× 12AX7 preamp tubes and 4× EL34 power tubes.

When was the Yorkville Sound Mono Block II produced?

The Yorkville Sound Mono Block II was produced 1969–1976.

Yorkville Sound Mono Block II preset

Close · 75/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Yorkville Mono Block II was a powerful Canadian tube power amplifier designed for professional PA and instrument use. Its EL34 output section delivered robust, clean headroom suited to the demanding requirements of touring bands.

Years produced: 1969–1976
Made in: Canada
Wattage: 100W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 4× EL34

Tags: british, vintage, clean.

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.