Standel Acoustic Magnifiers / PA Amp (PB50/PB100/AM4B/AM4BS/AM30S/AM24S preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

Standel's Acoustic Magnifiers and PA amp range (including PB50, PB100, AM series) represent the company's versatile professional audio systems designed for both acoustic instrument reinforcement and PA use. These multi-model systems show Standel's engineering breadth beyond guitar amplification.

• Years produced: 1960s–1970s
• Made in: USA

Tags: american, vintage.

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.