AKG P170 Perception Series Small Diaphragm Condenser Microphone The Perception P170 is a small-diaphragm condenser microphone for recording of overheads, percussions, acoustic guitars and strings. Its lightweight 1/2-inch true condenser transducer diaphragm delivers outstanding clarity and transient response. A switchable attenuation pad enables the Perception 170 to be used close to sound sources delivering up to 155dB SPL.