Ampeg SVT Classic - Normal preset

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

The SVT Classic is a reissue of the original SVT, faithfully reproducing the circuit of the 1969 original. This audio schematic provides the complete signal path from input to output transformer. The SVT-CL delivers the authentic 300-watt tube bass tone that professional bass players have relied on for over five decades.

• Years produced: 1990–present
• Made in: USA
• Wattage: 300W
• Channels: 2
• Preamp tubes: 6× 12AX7, 2× 12AU7
• Power tubes: 6× 6550

Known for: Paul McCartney, Geddy Lee, John Entwistle, Lemmy Kilmister, Geezer Butler, Cliff Burton.

Tags: bass, american, vintage, high-wattage, clean, reissue.

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.