12AU7 / ECC82  is a miniature nine-pin (B9A base) medium-gain dual triode vacuum tube. It belongs to a large family of dual triode vacuum tubes which share the same pinout (EIA 9A). 12AU7 is also known in Europe as ECC82. The tube is popular in hi-fi vacuum tube audio as a low-noise line amplifier, driver and phase-inverter in vacuum tube push-pull amplifier circuits.

TECHNICAL SPECIFICATIONS