Polytone V1B Reverb Preamp - Channel 2 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Polytone V1B is a solid-state reverb preamp used in Polytone's compact combos, known for clean jazz tone. Two identical channels each have two inputs, an op-amp gain stage with a Bright/Normal/Dark switch, Bass and Treble controls and their own Volume. The channels are mixed into a footswitchable spring reverb with its own level and a lamp-and-photocell modulation effect driven by an op-amp oscillator, then an output buffer to the power amp.

• Made in: USA
• Channels: 2

Tags: american, solid-state, clean, reverb, preamp.

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.