Marantz Hi-Fi Power Amplifier (2x6CA7) - Main preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

This Marantz Hi-Fi Power Amplifier using 2× 6CA7 output tubes (6CA7 being the American equivalent of EL34) represents one of Marantz's high-power monoblock or stereo designs from the late 1950s. Saul Marantz built amplifiers that combined technical innovation with musicality, establishing the brand as the gold standard of American tube hi-fi. These units are prized by audiophiles for their combination of power and sonic refinement.

• Years produced: 1958–1965
• Made in: USA
• Wattage: 70W
• Channels: 1
• Preamp tubes: 2× 12AX7
• Power tubes: 4× 6CA7

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.