{"product_id":"neumann-km-143","title":"Neumann KM 143","description":"\u003cp\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Miniature Microphone KM 143 The variable condenser miniature microphone system consists of several active microphone capsules with different directional characteristics, an output stage, and numerous accessories.\u003c\/p\u003e\n\u003cp\u003eCurrently there are seven active capsules available: omni diffuse-field equalized, omni free-field equalized, cardioid, wide-angle cardioid, cardioid with bass roll-off, hypercardioid, and figure-8.\u003c\/p\u003e\n\u003cp\u003eThrough the modular construction of mic capsules and the output stage it is very easy to adapt the system to a wide range of applications. The mic becomes nearly invisible during work with cameras (film, video), on stage, or suspended from the ceiling in a concert hall.\u003c\/p\u003e\n\u003cp\u003eAn active capsule can also be screwed directly onto the output stage. The result is a compact miniature microphone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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 system offers several condenser capsules with different directional characteristics.\u003c\/p\u003e\n\u003cp\u003eNumerous accessories can be mounted between the capsules and the output stage. 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.\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAcoustic features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAK 20 is a pressure gradient transducer with the figure-8 characteristic, realized with a single diaphragm. The 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° sound incidence. Corresponding accessories allow combining the AK 20 with other active capsules or microphones to obtain an MS-Stereo setup.\u003c\/li\u003e\n\u003cli\u003eAK 30 is a diffuse-field equalized pressure transducer with a flat frequency response up to 10 kHz (in the diffuse field). In the free sound field this microphone has a boost of approximately 7 dB at 10 kHz.\u003c\/li\u003e\n\u003cli\u003eAK 31 is a free-field equalized pressure transducer with a flat frequency response up to 20 kHz (in the free field). In the diffuse sound field this microphone has a high frequency roll-off above 5 kHz.\u003c\/li\u003e\n\u003cli\u003eAK 40 is a pressure gradient transducer with cardioid characteristic. The frequency curves are very smooth and match 0° sound incidence. Sound from sources within a pickup angle of ± 135° is reproduced without any coloration.\u003c\/li\u003e\n\u003cli\u003eAK 43 is a pressure gradient transducer with wide-angle cardioid characteristic. Attenu- ation at 90° is 4 dB, at 135° it is 8 dB and at 180° it is 11 dB. The frequency response curves for sound sources within an angle of ± 90° are parallel up to 12 kHz.\u003c\/li\u003e\n\u003cli\u003eAK 45 is a pressure gradient transducer with cardioid characteristic, similar to the AK 40. However, it has an acoustic bass roll-off that is useful during applications when subsonic and low frequencies may cause difficulties. The AK 45 is optimized for a flat low frequency response at a recording distance of 15 cm (“speech cardioid”).\u003c\/li\u003e\n\u003cli\u003eAK 50 is a pressure gradient transducer with hypercardioid characteristic. Attenuation of sound incidence from the side or rear is about 10 dB, with minimum sensitivity at an angle of 120°.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eElectrical features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe KM 100 is phantom powered (48 V) and uses transformerless output circuitry. This has several advantages. It features high output capability and extremely low self noise. It provides exceptionally clean sound, free of any coloration. As with traditional transformers, this circuit approach ensures good common mode rejection. The balanced output signal is protected against interference.\u003c\/p\u003e\n\u003cp\u003eThe construction is extremely compact. The entire microphone circuitry is on a single hybrid module measuring only 2 cm² in area. It is built into the microphone capsule, therefore the term “active capsules”.\u003c\/p\u003e\n\u003cp\u003eAll sensitive components are protected within the capsule. As a result, the quality of the audio signal is never compromised through the use of accessories, for example, when the capsule is detached from the output stage and mounted on a cable or a gooseneck.\u003c\/p\u003e\n\u003cp\u003eEven with a long cable between active capsule and output stage, the signal is immune to external interference.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePreattenuation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe output stage has a 10 dB switch. Attenuation is achieved by reducing the capsule voltage to one third.\u003c\/p\u003e\n\u003cp\u003eWhen the switch is on, the microphone is capable of accepting sound pressure levels up to 150 dB without being overloaded.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConnectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eTo diminish the number of connectors within the KM 100 System some accessories were modified. They can now be screwed directly onto the KM 100 output stage without using the KA 100 cable adapter. The new accessories which include the cable adapter, were renamed adding the suffix KA. For example: LC 3 is now LC 3 KA.\u003c\/p\u003e\n\u003cp\u003eThe separate KA 100 cable, needed for older accessories, will be available also in future.\u003c\/p\u003e\n\u003cp\u003eThe KM 100 output stage has a 3-pin XLR connector.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSound diffraction sphere\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe SBK 130 A sound diffraction sphere slips onto the front of the KM 130\/KM 131 pressure microphones. The diaphragm becomes an integral part of the surface of the sphere. This affects the frequency response of the microphones.\u003c\/p\u003e\n\u003cp\u003eWhile sounds coming from the front-half space are emphasized by up to 2.5 dB between 2 kHz and 10 kHz, sounds arriving from the rear-half space are attenuated by a maximum of 2.5 dB in the range above 5 kHz.\u003c\/p\u003e\n\u003cp\u003eSince the sound diffraction sphere causes the pressure buildup of the KM 130\/KM 131 pressure microphones to begin earlier, the frequency response rises smoothly in the middle and upper range. This is similar to a typical pressure gradient microphone, where the directivity increases with rising frequencies. However, since the KM 130\/KM 131 are pressure microphones, they maintain a linear sensitivity down to the lowest frequencies.\u003c\/p\u003e\n\u003cp\u003eThis changing directivity allows to record at a greater distance from the sound source, and makes the KM 130\/KM 131 microphones especially suited as stereo main microphones in A-B configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStereo recordings\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBy means of the AC 30 adapter cable two active capsules, AK 20 and e.g. AK 40 can be connected as MS stereo pair directly with the MTX 191 (A) matrix amplifier. The XY or MS signal is then available at the 5-pin XLR output connector of the MTX 191 (A), and the recording angle can be electrically remote controlled. The output stages KM 100 are then not required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStereo set\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe cardioid and hypercardioid microphones are also available as complete stereo sets, SKM 140 and SKM 150, including all accessories in a single jeweler's box. A further SKM 100-MS Stereo Set containing the microphones KM 120 and KM 140 is available.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDiameter: 22 mm\u003c\/li\u003e\n\u003cli\u003eLength: 92 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 80 g\u003c\/li\u003e\n\u003cli\u003eCurrent consumption (P48, IEC 61938): 2 mA\u003c\/li\u003e\n\u003cli\u003eDirectional Pattern: Cardioid wide angle\u003c\/li\u003e\n\u003cli\u003eFrequency Range: 20 Hz ... 20 kHz\u003c\/li\u003e\n\u003cli\u003eMatching connector: XLR 3 F\u003c\/li\u003e\n\u003cli\u003eRated Impedance: 50 Ohms\u003c\/li\u003e\n\u003cli\u003eSupply voltage (P48, IEC 61938): 48 V ± 4 V\u003c\/li\u003e\n\u003cli\u003eAcoustical operating principle: Pressure gradient transducer\u003c\/li\u003e\n\u003cli\u003eMaximum output voltage: 10 dBu\u003c\/li\u003e\n\u003cli\u003eRated load impedance: 1000 Ohms\u003c\/li\u003e\n\u003cli\u003eEquivalent noise level, CCIR: 25 dB\u003c\/li\u003e\n\u003cli\u003eMaximum SPL for THD 0.5%: 138 dB\u003c\/li\u003e\n\u003cli\u003eEquivalent noise level, A-weighted: 16 dB-A\u003c\/li\u003e\n\u003cli\u003eSensitivity at 1 kHz into 1 kohm: 15 mv\/Pa\u003c\/li\u003e\n\u003cli\u003eMaximum SPL for THD 0.5% with preattenuation: 148 dB\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio, CCIR (re. 94 dB SPL): 69 dB\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio, A-weighted (re. 94 dB SPL): 78 dB\u003c\/li\u003e\n\u003cli\u003eSignal-to-noise ratio, CCIR (re. 94 dB SPL): 69 dB\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Neumann","offers":[{"title":"Default Title","offer_id":43894121922603,"sku":"NEU-007109","price":1050.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/Neumann_KM_143_copy__01563.1697487507.1280.1280.jpg?v=1775682417","url":"https:\/\/www.empirepro.com\/products\/neumann-km-143","provider":"Empire Pro","version":"1.0","type":"link"}