Multivox Model 45 preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Multivox Model 45 is a late-1970s single-ended valve combo. A mic input and two instrument inputs mix into one half of a 12AX7, then Volume and Tone controls and the second 12AX7 stage drive a single cathode-biased 7591A with no negative feedback. A 6AV6 runs the tremolo, with a speed control, manual off switch and footswitch jack, and two 1N4007 diodes rectify the supply. Multivox was a New York maker and importer that also sold the Premier brand.

• Made in: USA
• Channels: 1
• Preamp tubes: 1× 12AX7, 1× 6AV6
• Power tubes: 1× 7591A

Tags: american, 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.