The AKG CK 2 is a small capsule condenser microphone capsule for use with the C 451 Power Supply Module. The CK 2 is a omnidirectional capsule, that is often used for ambient capture of halls and auditoriums. It can also be used for close-mic applications in order to avoid proximity effect. The frequency response of the CK 2 is extremely flat with an extended on axis response and uniform off-axis pattern. It is equally at home in the studio as well as live sound-reinforcement scenarios.