Oliver PA-100X - Normal preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Oliver PA-100X is a 1970 tube amplifier head from Oliver Sound of Westbury, New York, with two differently voiced channels. Channel 1 has its volume ahead of bass and treble controls; Channel 2 puts a treble, bass and mid-range stack with an ultra-high switch ahead of its volume. Both 6EU7 channels mix into a 6AN8 phase inverter driving two fixed-bias 7027A output tubes with negative feedback, on a 5AR4 rectifier, with 8 and 16 ohm outputs.

• Made in: USA
• Channels: 2
• Preamp tubes: 2× 6EU7, 1× 6AN8
• Power tubes: 2× 7027A

Tags: american, vintage, 6l6, two-channel, clean.

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.