Selmer All Purpose 30 SV preset

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

A Selmer All Purpose 30 variant with a different circuit from the standard All Purpose 30. An ECC83 preamp and an ECC82 long-tailed-pair phase inverter drive a push-pull pair of EL506 output tubes from a solid-state bridge rectifier, for about 30 watts. Like the rest of the All Purpose line, it is a general-use amp suited to guitar, bass or voice.

• Made in: UK
• Wattage: 30W
• Channels: 1
• Preamp tubes: 1× ECC83, 1× ECC82
• Power tubes: 2× EL506

Tags: british, vintage, clean, 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.