What tubes does the Ampeg SVT-8PRO Bass Amp Preamp - Main use?

The Ampeg SVT-8PRO Bass Amp Preamp - Main uses 2× 12AX7 preamp tubes.

When was the Ampeg SVT-8PRO Bass Amp Preamp - Main produced?

The Ampeg SVT-8PRO Bass Amp Preamp - Main was produced 2010s.

Ampeg SVT-8PRO Bass Amp Preamp - Main preset

Close · 78/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The SVT-8PRO Bass Amp Preamp schematic documents the tube preamp and tone-shaping section of Ampeg's flagship 2500-watt hybrid bass head. The 12AX7-driven preamp provides SVT-quality warmth and tonal control feeding the massive solid-state power section. An essential reference for the most powerful bass head Ampeg has produced.

Years produced: 2010s
Made in: USA
Wattage: 2500W
Channels: 1
Preamp tubes: 2× 12AX7

Tags: bass, american, modern, high-wattage, hybrid.

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.