Ampeg VH-70 (VH-150 Guitar Amp Preamp) - Channel B preset

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

The VH-70 is the preamp section of the VH-150 guitar amp in a standalone format, or an alternate 70-watt version of Ampeg's EL34-powered guitar head. Channel A provides clean headroom while the drive channel delivers aggressive, harmonically complex overdrive. The EL34 output stage gives it a British-influenced character.

• Years produced: 1992–1997
• Made in: USA
• Wattage: 70W
• Channels: 2
• Preamp tubes: 3× 12AX7
• Power tubes: 2× EL34

Tags: guitar, american, modern, mid-wattage, drive.

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.