Carvin B800 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The B800 is an 800-watt solid-state Carvin bass head, also used in a bi-amp combo. A passive/active input feeds a discrete JFET drive stage, then a six-band tone section of treble, low mid, high mid, bass, mid and sub-bass, master volume, effects loop, mute and tuner out, with a balanced pre/post DI. The main power amp uses MJE15032/15033-driven output banks, and the combo version adds a crossover and a separate high-frequency amp.

• Years produced: 2005–2007
• Made in: USA
• Wattage: 800W
• Channels: 1

Tags: american, bass, solid-state, high-wattage.

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.