What tubes does the Duncan Amplification Blues-112 use?

The Duncan Amplification Blues-112 uses 2× 12AX7, 1× 12AT7 preamp tubes and 2× EL84 power tubes.

When was the Duncan Amplification Blues-112 produced?

The Duncan Amplification Blues-112 was produced 1997.

Duncan Amplification Blues-112 preset

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

The Blues-112 is a one-off valve practice combo built by Duncan Amplification and completed in 1997, not a production model. An op-amp input buffer feeds three 12AX7 gain stages with a Gain control and a four-position Clean/Crunch/Dirty/Hi-gain switch, then treble, bass and mid, a series effects loop, spring reverb and a Volume. A 12AT7 inverter drives two cathode-biased EL84s for about 10 watts, with a Triode/Pentode switch for lower power.

Years produced: 1997
Wattage: 10W
Channels: 1
Preamp tubes: 2× 12AX7, 1× 12AT7
Power tubes: 2× EL84

Tags: el84, low-wattage, clean, crunch.

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