What tubes does the Conrad-Johnson MV75a-1 - Main use?

The Conrad-Johnson MV75a-1 - Main uses 2× 12AX7 preamp tubes and 4× EL34 power tubes.

When was the Conrad-Johnson MV75a-1 - Main produced?

The Conrad-Johnson MV75a-1 - Main was produced 1980–1993.

Conrad-Johnson MV75a-1 - Main preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

Conrad-Johnson is a prestigious American high-end audio company producing benchmark tube amplifiers for the audiophile market since the late 1970s. The MV75 was a well-regarded monaural power amplifier using EL34 output tubes, celebrated for its warm, musical presentation.

Years produced: 1980–1993
Made in: USA
Wattage: 75W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 4× EL34

Tags: american, modern, 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.