Orange Terror Bass 500 preset

Close · 68/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Terror Bass 500 is a compact 500-watt hybrid bass head from around 2009 that pairs a valve preamp with a lightweight solid-state power amp in a lunchbox-size chassis. Two 12AX7s handle the preamp: a gain stage with the Gain control, a second stage into a passive treble, bass and mid stack, a recovery stage, an effects send/return, then the Volume and a cathode-follower output. An op-amp stage feeds a balanced DI output with a ground-lift switch.

• Introduced: 2009
• Made in: UK
• Wattage: 500W
• Channels: 1
• Preamp tubes: 2× 12AX7

Tags: british, hybrid, bass, high-wattage.

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.