What tubes does the McIntosh MC30 use?

The McIntosh MC30 uses 2× 12AX7, 1× 12AU7, 1× 12BH7 preamp tubes and 2× 1614 power tubes.

When was the McIntosh MC30 produced?

The McIntosh MC30 was produced 1954–1963.

McIntosh MC30 preset

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

The McIntosh MC-30 is a 30-watt mono valve power amplifier from the mid-1950s, sold as a mono block to pair with a separate preamp. A Gain control feeds a 12AX7 input stage, a 12AU7 voltage amp and phase inverter, a 12BH7 push-pull driver and a 12AX7 cathode-follower driver. Two fixed-bias 1614 beam tetrodes (6L6 family) drive a McIntosh Unity Coupled output transformer with 4/8/16-ohm and 600-ohm taps, from a 5U4GA rectifier.

Years produced: 1954–1963
Made in: USA
Wattage: 30W
Channels: 1
Preamp tubes: 2× 12AX7, 1× 12AU7, 1× 12BH7
Power tubes: 2× 1614

Tags: american, vintage, power-amp, 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.