What tubes does the Soldano X88R use?

The Soldano X88R uses 6x 12AX7 preamp tubes.

When was the Soldano X88R produced?

The Soldano X88R was produced 1989–2001.

Who famously used the Soldano X88R?

Warren DeMartini, George Lynch, and Lou Reed are among the notable players associated with the Soldano X88R.

Soldano X88R preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Soldano X88R is a two-channel rack-mount tube preamplifier regarded as one of the finest high-gain preamps ever produced, used extensively by professional rock and metal guitarists in the late 1980s and 1990s. Each channel features independent gain, EQ, and output level controls with extremely quiet operation — a rarity in high-gain rack preamps. The X88R was used by Warren DeMartini, George Lynch, and other prominent shred-era guitarists.

Years produced: 1989–2001
Made in: USA
Channels: 2
Preamp tubes: 6x 12AX7

Known for: Warren DeMartini, George Lynch, Lou Reed.

Tags: high-gain.

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.