What tubes does the Kalamazoo Bass 30 - Main use?

The Kalamazoo Bass 30 - Main uses 2x 12AX7 preamp tubes and 2x 6L6 power tubes.

When was the Kalamazoo Bass 30 - Main produced?

The Kalamazoo Bass 30 - Main was produced 1965–1970.

Kalamazoo Bass 30 - Main preset

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

The Kalamazoo Bass 30 is a budget-oriented bass amplifier produced by Gibson's Kalamazoo subsidiary, offering 30 watts of tube-powered low-end amplification at an accessible price point. Its straightforward circuit with a single bass and treble control provides a warm, round bass tone well suited for small venue use. The Kalamazoo name allowed Gibson to reach budget-conscious musicians without diluting its flagship brand.

Years produced: 1965–1970
Made in: USA
Wattage: 30W
Channels: 1
Preamp tubes: 2x 12AX7
Power tubes: 2x 6L6

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.