Sunn Model 60 preset

verified · 86/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Sunn Model 60 is a 60-watt valve amp from the company's Tualatin, Oregon factory, built as a separate preamp and power amp joined by preamp-out and amp-in jacks. The preamp uses two 7025s in four stages with a Bass control after the first pair, a Volume, and a second Bass/Treble network. In the power amp a 6AN8 pentode driver and triode split-load inverter, with feedback from the output, drive two fixed-bias KT88s into 4/8/16-ohm taps, from a GZ34 rectifier and choke.

Tags: american, 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.