12EZ6 is a miniature glass-enveloped vacuum tube with a 9-Pin base type, and is most commonly used for voltage regulation and audio-frequency preamplifier applications. It is a pentode vacuum tube with a plate resistance of 6250 ohms and a plate maximum dissipation rating of 2.5 watts. A 12EZ6 typically requires a high voltage of around 375V and a grid bias voltage of -6V. The frequency response of the 12EZ6 ranges from 20 Hz to 30,000 Hz and can be used as a power amplifier at 1 watt. The 12EZ6 has a transconductance of 2,350 micromhos and a mutual conductance of 3.8 milli-mhos.