What tubes does the Orange Mkii1973 use?

The Orange Mkii1973 uses 4× ECC83 (12AX7) preamp tubes and 4× EL34 power tubes.

When was the Orange Mkii1973 produced?

The Orange Mkii1973 was produced 1973–1974.

Who famously used the Orange Mkii1973?

Geddy Lee are among the notable players associated with the Orange Mkii1973.

Orange Mkii1973 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 1973 Orange MKII represents a mid-run variant of the classic OR series, built during a year when Orange was supplying amplifiers to many of the leading British rock acts touring major venues. Subtle circuit changes relative to the 1972 build reflect ongoing refinement of the output transformer and bias arrangement, contributing to a slightly tighter low-end response while maintaining the brand's essential warm, harmonically rich character. Tonally the 1973 MKII is broadly consistent with adjacent production years but is distinguished by specific component batches that give experienced collectors a reason to seek individual serial numbers.

Years produced: 1973–1974
Made in: UK
Wattage: 120W
Channels: 1
Preamp tubes: 4× ECC83 (12AX7)
Power tubes: 4× EL34

Known for: Geddy Lee.

Tags: british, crunch, 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.