Catalog excerpts
KEM 975 Cardioid Plane Microphone with non-rotation-symmetrical polar pattern • Line array condenser microphone system • Recording of extensive or moving sound sources • Optical display for optimum recording area • Latency-free analogue signal processing • Transformer-balanced output, line level Optional with delta capsule • Frequency-constant directiv
Open the catalog to page 1Cardioid Plane Microphone KEM 975 The cardioid plane microphone KEM 975 is a line array microphone system with a largely frequency-independent polar pattern, which shows - in the horizontal plane - the feature of a cardioid microphone and - in the vertical plane the feature of a directional microphone with an opening angle of approx. 30 degrees. Thus, the polar pattern is adapted to the frequent case that the sound source to be transmitted is extended in a level or moves in it, and sound coming from the other directions is to be suppressed at the same time. The sound to be suppressed may...
Open the catalog to page 2Acoustic properties The KEM 975 has a directional distribution of sensitivity, which is not rotationally symmetric to the reference axis. The designation “cardioid plane microphone” results from this special directional distribution (flat cardioid). Regarding the polar pattern, the KEM 975 shows - in the horizontal plane the features of a cardioid microphone with an opening angle of 120 degrees and - in the vertical plane - the feature of a directional microphone with an opening angle of 30 degrees. Due to a signal processing adjusted to the capsule position, the vertical opening angle...
Open the catalog to page 3Electrical properties The circuit design of the KEM 975 includes a particularly lownoise impedance converter technology which is specifically designed for the used capsules and their line array arrangement. With five amplification levels that can be adjusted on the power supply, it allows for a very large dynamic range for sound pressure levels up to 152 dB at a distortion factor of a maximum of 0.5 %. In combination with the equivalent noise level of 15 dB(A), the low-noise transmission of low sound pressures and the distortion-free representation of very high sound pressures are thus...
Open the catalog to page 4Product overview Delivery The KEM 975 will be delivered in the following variations: Cardioid Plane Microphone Power supply Microphone holder Microphone cable Power cable Rack installation kit Aluminium Suitcase 450 x160 x 365 mm satin nickel dark bronze Option: Delta-capsule satin nickel dark bronze Accessories For the KEM 975 the following accessories is optionally available: Windscreen Microphone holder satin nickel dark bronze Microphone holder for elastic-stationary fixing satin nickel dark bronze Microphone holder for elastic-stationary fixing satin nickel dark bronze Connection...
Open the catalog to page 5Technical specifications Cardioid Plane Microphone Polar pattern horizontal vertical horizontal vertical Recording angle Acoustic operating principle Frequency range Sensitivity at 1 kHz (switch position “line”) Rated impedance Equivalent loudness level CCIR 468-4 DIN EN 60268-4 gain 12 dB gain 0 dB gain -12 dB gain -24 dB gain -36 dB cardioid club shaped 120 degree 30 degree Pressure gradient transducer 40 to 18000 Hz 775 mV/Pa 40 Ohm 24 dB 15 dB(A) 104 dB 116 dB 128 dB 140 dB 152 dB Neutrik XLR5M protection basket amplifier 40 mm 25 mm satin nickel dark bronze Power supply N 975 Power...
Open the catalog to page 6Technical specifications Frequency response Polar patterns
Open the catalog to page 7Microtech Gefell GmbH Georg-Neumann-Platz 07926 Gefell Germany Phone +49(0)36649882-0 Fax +49 (0)36649 882-11 www.microtechgefell.de info@microtechgefell.de P.EN 201180.01 (10.09.2017) ~c Microtech Gefell GmbH
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