Ampeg Manhattan 625-D - Channel 1 preset

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

The Ampeg Manhattan 625-D is a two-channel tube combo built on octal tubes. Each channel runs 6SN7 triodes through a passive bass/treble network, then the channels mix into a 6SL7 paraphase inverter and a cathode-biased pair of 6L6s for about 30 watts, with a 5U4 rectifier.

• Made in: USA
• Wattage: 30W
• Channels: 2
• Preamp tubes: 3× 6SN7, 1× 6SL7
• Power tubes: 2× 6L6

Tags: american, vintage, 6l6, two-channel, mid-wattage.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.