What tubes does the Fender Bassman 300 - Channel 2 use?

The Fender Bassman 300 - Channel 2 uses 3× 12AX7, 1× 12AT7 preamp tubes and 6× 6550C power tubes.

When was the Fender Bassman 300 - Channel 2 produced?

The Fender Bassman 300 - Channel 2 was produced 2002–2013.

Fender Bassman 300 - Channel 2 preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Bassman 300 is a 2000s Fender tube bass head built on a hybrid preamp. One input with a pad switch feeds two 12AX7 channels, a clean volume channel and a gain channel, which can be mixed, followed by JFET switching and op-amp tone shaping, a sub-bass crossover and an effects loop, with a tuner out and footswitch. A 12AX7 and 12AT7 driver stage feeds six 6550C power tubes with bias and balance adjustment, and an impedance selector for the main and extension speakers.

Years produced: 2002–2013
Wattage: 300W
Channels: 2
Preamp tubes: 3× 12AX7, 1× 12AT7
Power tubes: 6× 6550C

Tags: bass, hybrid, 6550, high-wattage, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.