What tubes does the Marantz Model 8B - Ch B use?

The Marantz Model 8B - Ch B uses 3× 12AX7 preamp tubes and 4× EL34 power tubes.

When was the Marantz Model 8B - Ch B produced?

The Marantz Model 8B - Ch B was produced 1960–1965.

Marantz Model 8B - Ch B preset

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

The Marantz Model 8B is a 70-watt stereo tube power amplifier from Saul Marantz's company, widely regarded as one of the finest amplifiers ever made and a cornerstone of the vintage hi-fi canon. Using EL34 output tubes with an innovative ultralinear circuit, the 8B delivers exceptional clarity, detail, and musicality. It remains one of the most coveted vintage tube amplifiers among serious audiophiles worldwide.

Years produced: 1960–1965
Made in: USA
Wattage: 70W
Channels: 1
Preamp tubes: 3× 12AX7
Power tubes: 4× EL34

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.