What tubes does the TopHat Ambassador Preamp use?

The TopHat Ambassador Preamp uses 3× 12AX7 preamp tubes.

When was the TopHat Ambassador Preamp produced?

The TopHat Ambassador Preamp was produced 1994–2015.

TopHat Ambassador Preamp preset

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

The Top Hat Ambassador Preamp is the preamplifier section of Top Hat Amplification's Ambassador model, a boutique hand-wired amplifier from the California-based builder. Top Hat amps draw inspiration from vintage British designs, particularly Vox and Marshall, while adding refined American boutique craftsmanship. The preamp section delivers clear, touch-sensitive tones with excellent harmonic complexity.

Years produced: 1994–2015
Made in: USA
Channels: 2
Preamp tubes: 3× 12AX7

Tags: american, modern, british.

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.