Neumann KM 120 set includes a KM 100 (transformerless output stage) and an AK 20 pressure gradient transducer. Neumann KM 120 Set features a figure-8 polar pattern, realized with a single diaphragm. KM120 also includes a WNS 100 series windscreen, an SG 21/ stand/mount swivel and a Neumann wooden box.
The AK20's diaphragm diameter is just 16 mm. All sound field components reach the diaphragm directly. This results in identical frequency response curves and output levels at 0 and 180 degrees sound incidence. Corresponding accessories allow combining the AK 20 with other active capsules or microphones (i.e. with an AK 40 or other cardioid mic) to obtain an MS-Stereo setup. It is also great for ambience and dual speaker placement at conferences and other public speaking environments.
The Neumann KM120 becomes nearly invisible during work with cameras (film, video), on stage, or suspended from the ceiling in a concert hall. An active capsule can also be screwed directly onto the output stage. The microphones are only 92 or 110 mm resp. long and 22 mm in diameter. They consist of the condenser capsule and the output stage. Both parts can be unscrewed from each other. The capsules attach to cables, capsule extensions, swivel mounts, table stands, goose-necks, stereo mounts, and hangers. Therefore, it is very easy to adapt the system to a wide range of applications. The active capsule itself is only 35 or 47 mm resp. long. The KM 100 output stage and the active microphone capsule may be separated by up to 50 m of interconnecting cable. These cables are 3 mm in diameter, and therefore very inconspicuous.