What tubes does the Magnatone M-8 - Channel 2 use?

The Magnatone M-8 - Channel 2 uses 3× 7025, 2× 12AU7 preamp tubes and 2× 7189A power tubes.

When was the Magnatone M-8 - Channel 2 produced?

The Magnatone M-8 - Channel 2 was produced 1963–1964.

Magnatone M-8 - Channel 2 preset

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

The Magnatone M-8 is a 1963–64 Custom Series combo, not a bare beginner's amp. Two channels, each with high- and low-gain inputs on a 7025 and its own Loudness, share a Tone control and a Mellow/Normal/Bright contour switch. A 12AU7 varistor bridge driven by a 7025 oscillator (Speed, Intensity, footswitch) gives Magnatone's pitch vibrato, a 12AU7 drives delay-line reverb, and a 12AU7 inverter feeds two 7189As.

Years produced: 1963–1964
Made in: USA
Wattage: 25W
Channels: 2
Preamp tubes: 3× 7025, 2× 12AU7
Power tubes: 2× 7189A

Tags: american, vintage, practice, low-wattage, two-channel.

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.