The 6N22P or 6922 is a dual triode vacuum tube. It was designed as a replacement for the EF86 pentode in preamplifier applications. It is one of the most commonly used high-transconductance low-noise amplifier tubes in modern audio equipment. The design enables high reliability, low noise and good linearity, making it ideal for many preamplifier applications. The 6N22P has very low noise levels, and can be used to amplify both microphone signals and low output-level signals from electric guitars and other instruments. It can also be used as an output tube in some audio systems.