The 6BF6 is a miniature-style, non-technical glass electron tube used mainly for small-signal audio amplifiers in applications such as audio mixers and portable radios. It is a 14-pin miniature type base tube, consisting of one triode (connected as a preamplifier and two pentodes, connected as two independent power amplifiers). It provides a high gain and wide frequency response, allowing for a wide range of audio and sound applications. In addition, it has a high input/output impedance ratio, allowing for easy input and output connections. The 6BF6 can be used in a variety of applications including low-power radio transmitters, audio mixers, speaker amplifiers, and home recording equipment.