Egnater IE-4 Preamp - Channel 3 preset

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

The IE4 is a four-channel all-valve guitar preamp by Bruce Egnater, built by Rocktron in the late 1990s, with no power amp. Front and rear inputs feed eight 12AX7WA valves arranged as cascaded gain stages, with optocoupler-switched signal paths selecting the channels under MIDI control. Each channel has its own gain, treble, middle, bass, presence and master, and the output stage has a dual output-level control for the rear outputs.

• Made in: USA
• Channels: 4
• Preamp tubes: 8× 12AX7

Tags: american, preamp, multi-channel.

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.