Standel PR5B & PR5R Master Control - Norm preset

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

The Standel PR5B and PR5R are dual-purpose bass/reverb amplifiers from Standel's professional range, featuring a master control section for integrated tone management. These models demonstrate Standel's forward-thinking approach to amp feature design in the 1960s.

• Years produced: 1960s
• Made in: USA
• Channels: 2

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.