Multivox Model 45 7591 Circa1977 78 preset

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

The Multivox Model 45 is a late-1970s tube combo using the 7591 output tube, one of the final tube amplifier designs from Multivox before solid-state designs became dominant. Its 7591-based circuit delivers a warm, mid-forward tone characteristic of American tube amps from this transitional era. The Model 45 represents the tail end of Multivox's tube amplifier production before the company's eventual decline.

Tags: american, 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.