What tubes does the Ampeg 625D - Channel One use?

The Ampeg 625D - Channel One uses 2× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Ampeg 625D - Channel One produced?

The Ampeg 625D - Channel One was produced 1963–1967.

Ampeg 625D - Channel One preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Ampeg 625D was a mid-1960s guitar combo aimed at the working guitarist seeking a clean, full-voiced American tone at modest wattage. Built to the same quality standards as Ampeg's bass line, the 625D offered warm, articulate cleans with a touch of vintage sag. It represents Ampeg's broader push into the guitar amplifier market during the peak of the 1960s guitar boom, sharing circuit DNA with other Gemini-era combos.

Years produced: 1963–1967
Made in: USA
Wattage: 25W
Channels: 2
Preamp tubes: 2× 12AX7
Power tubes: 2× 6L6

Tags: american, vintage, 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.