What tubes does the Ampeg B-12NC / B-15NC - Channel 2 use?

The Ampeg B-12NC / B-15NC - Channel 2 uses 2× 12AX7 preamp tubes and 2× 6L6 power tubes.

When was the Ampeg B-12NC / B-15NC - Channel 2 produced?

The Ampeg B-12NC / B-15NC - Channel 2 was produced 1961–1965.

Ampeg B-12NC / B-15NC - Channel 2 preset

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

The Ampeg B-12NC is a Portaflex flip-top bass combo with a 12-inch speaker, representing a mid-period circuit revision within the B-12 family. Slightly less powerful than the B-15 variants, the B-12NC still delivered the essential Ampeg Portaflex tone — warm, round, and articulate — in a more compact and lighter format. It was appealing to bassists who needed the Portaflex sound but valued the smaller size of the 12-inch configuration.

Years produced: 1961–1965
Made in: USA
Wattage: 25W
Channels: 1
Preamp tubes: 2× 12AX7
Power tubes: 2× 6L6

Tags: american, vintage, clean.

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