What tubes does the Gibson GA-77RVT Crestline - Channel 1 use?

The Gibson GA-77RVT Crestline - Channel 1 uses 3× 12AX7 preamp tubes and 4× 6V6 power tubes.

When was the Gibson GA-77RVT Crestline - Channel 1 produced?

The Gibson GA-77RVT Crestline - Channel 1 was produced 1963–1967.

Gibson GA-77RVT Crestline - Channel 1 preset

Verified · 82/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GA-77RVT Crestline is the fully equipped version of the GA-77, offering reverb and tremolo alongside the warm 6V6 output stage in a mid-1960s Crestline-cosmetic cabinet. It represents the most feature-rich iteration of Gibson's top-tier 1960s combo, covering reverb ambience and rhythmic tremolo alongside two channels of versatile clean American tone. The Crestline styling marks it as a mid-decade product with updated aesthetics compared to the earlier GA-77 variants.

Years produced: 1963–1967
Made in: USA
Wattage: 35W
Channels: 2
Preamp tubes: 3× 12AX7
Power tubes: 4× 6V6

Tags: american, clean, vintage.

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.