Standel PB 25 - Main preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Standel PB-25 is a compact tube practice bass amplifier from Standel's mid-period production, offering 25 watts of clean bass amplification. Built by one of California's most respected early amp manufacturers, it reflects Standel's dedication to quality construction.

• Years produced: 1960s
• Made in: USA
• Wattage: 25W
• Channels: 1

Tags: american, vintage, bass.

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.