What tubes does the Carvin VTR2800 - Sustain use?

The Carvin VTR2800 - Sustain uses 1× 12AT7 preamp tubes and 4× EL34 power tubes.

When was the Carvin VTR2800 - Sustain produced?

The Carvin VTR2800 - Sustain was produced 1976–1980.

Carvin VTR2800 - Sustain preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The VTR2800 is a late-1970s Carvin hybrid guitar amp. Its solid-state preamp has Normal and Sustain channels switched by a CMOS gate, each with its own volume; Sustain adds sustain drive and a master. A spring reverb and a seven-band graphic EQ follow, with footswitching for channel and reverb. The MC2800 power amp uses a 12AT7 long-tail phase inverter driving four 6CA7/EL34s; the VT-112 version runs two output tubes.

Years produced: 1976–1980
Made in: USA
Wattage: 100W
Channels: 2
Preamp tubes: 1× 12AT7
Power tubes: 4× EL34

Tags: american, two-channel.

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.