What tubes does the Hiwatt 50W Sa112 use?

The Hiwatt 50W Sa112 uses 4× ECC83 (12AX7) preamp tubes and 2× EL34 power tubes.

When was the Hiwatt 50W Sa112 produced?

The Hiwatt 50W Sa112 was produced 1971–1981.

Hiwatt 50W Sa112 preset

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

The Hiwatt SA112 is a 50-watt combo housing a single 12-inch speaker, bringing the DR504's circuit into a self-contained format aimed at rehearsal studios and smaller venues. Handwired to the same exacting standards as the standalone heads, the SA112 delivers a faithful reproduction of the Hiwatt clean sound in a more portable package. The combination of a 12-inch driver and 50 watts of EL34 power produces a focused, articulate tone that holds together at both bedroom and stage volumes, making it a practical choice for players who needed genuine Hiwatt quality without a separate cabinet.

Years produced: 1971–1981
Made in: UK
Wattage: 50W
Channels: 2
Preamp tubes: 4× ECC83 (12AX7)
Power tubes: 2× EL34

Tags: british, clean, 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.