What tubes does the Ampeg V-4BH - Main use?

The Ampeg V-4BH - Main uses 4× 12AX7 preamp tubes and 4× 6L6 power tubes.

When was the Ampeg V-4BH - Main produced?

The Ampeg V-4BH - Main was produced 2012–present.

Ampeg V-4BH - Main preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The V-4BH is a reissue of the original V-4B bass head, faithfully recreating the 100-watt all-tube bass circuit. The Main channel delivers warm, authoritative bass tone from four 6L6 output tubes. The reissued V-4BH offers the classic V-4B character with improved reliability and modern component tolerances.

Years produced: 2012–present
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 4× 12AX7
Power tubes: 4× 6L6

Tags: bass, american, modern, mid-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.