- Perfectly matched microphone pair thanks to AKG 's sophisticated computer algorithm - Highest possible agreement across the entire frequency range and practically identical sensitivity - Selected from thousands of individual microphones - Developed and hand-made in Vienna, Austria Convincing stereo recordings require not only microphones with outstanding sound properties and excellent quality, but also the highest level of consistency and fidelity. Therefore, at AKG each C 414 pair is selected from thousands of microphone measurements using a sophisticated computer algorithm. The result is perfect microphone pairs that have the highest possible agreement across the entire frequency range and practically identical sensitivities. These are the prerequisites for breathtaking, three-dimensional recordings. Two microphones are available as a stereo pair, which differ from each other by less than 1 dB in terms of both sensitivity and individual frequency response with a cardioid characteristic between 300 Hz and 8,000 Hz. The two microphones are filtered out from a large number of individual microphones according to the aforementioned criteria using a special computer program. This ensures a good and stable balance without frequency-dependent shifts in the panorama when using the stereo pair for stereo recordings using a wide variety of techniques. The set includes the standard accessories (with the exception of the PF 80) and a stereo rail, as well as the individual frequency curves in an attractive carrying case (large Soundtool Case).