{"product_id":"neumann-u-87-ai-stereo-set","title":"Neumann U 87 AI STEREO SET","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\r\n\u003cp\u003eNeumann U 87\u003cspan style=\"font-size: 12px;\"\u003e is probably the best known and most widely used Neumann studio microphone. It is equipped with a large dual-diaphragm capsule with three directional patterns: omnidirectional, cardioid and figure-8. These are selectable with a switch below the headgrille. \u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003eA 10 dB attenuation switch is located on the rear. It enables the microphone to handle sound pressure levels up to 127 dB without distortion.\u003c\/p\u003e\r\n\u003cp\u003eFurthermore, the low frequency response can be reduced to compensate for proximity effect.\u003c\/p\u003e\r\n\u003cp\u003e\u003cstrong\u003eAcoustic features\u003c\/strong\u003e\u003c\/p\u003e\r\n\u003cp\u003eThe U 87 Ai is addressed from the front, marked with the Neumann logo. The frequency response of the cardioid and figure-8 directional characteristics are very flat for frontal sound incidence, even in the upper frequency range. The microphone can be used very close to a sound source without the sound becoming unnaturally harsh. By means of a high-pass filter interferences through subsonic and low frequencies are reduced remarkebly.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003ePolar patterns\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eThe dual-diaphragm capsule is elastically mounted and protected by a large headgrille. A switch below the headgrille selects the three directional patterns: omnidirectional, cardioid and figure-8. A window above this switch shows the symbol of the selected characteristic.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eElectrical features\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eThe letter A in the name indicates a more recent generation, as compared to the U 87 i microphones that were built from 1967 to 1986. Modifications apply to the electronic components of the microphone only; the capsule remained unchanged.\u003c\/p\u003e\r\n\u003cp\u003eThe present-day circuitry increases the operational headroom of the U 87 Ai by supplying the bias voltages for the capsule through a reduced resistance. The result is a higher sensitivity of 10 dB for identical sound pressure levels, and an improved S\/N ratio of 3 dB.\u003c\/p\u003e\r\n\u003cp\u003e\u003cb\u003eFilter and attenuation\u003c\/b\u003e\u003c\/p\u003e\r\n\u003cp\u003eA switch located at the rear attenuates the sensitivity by 10 dB. When this switch is activated, the microphone accepts sound pressure levels up to 127 dB (equivalent to a sound pressure of 45 Pa) without distortion.\u003c\/p\u003e\r\n\u003cp\u003eAn additional switch at the rear allows to change the microphone's cutoff frequency. This reduces low frequency interference directly at the input of the microphone amplifier.\u003c\/p\u003e\r\n\u003cp\u003eThis setting also compensates for the unavoidable bass boost that occurs with all pressure gradient transducers when they are used at close distance (proximity effect).\u003c\/p\u003e\r\n\u003cp\u003eThe cardioid characteristic maintains a smooth frequency response at a distance of 30 to 40 cm, the figure-8 characteristic even at a distance of 15 to 20 cm.\u003c\/p\u003e\r\n\u003cp\u003eNeumann U87 Ai Stereo Set - 2x U87 large diaphragm microphones, 2x EA87 shockmounts and 1x aluminium case (suitable for thomann 2x microphones and 2x shockmounts). Colour: Nickel\u003c\/p\u003e","brand":"Neumann","offers":[{"title":"Default Title","offer_id":43894125232171,"sku":"NEU-008505","price":6557.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0642\/3019\/5243\/files\/NEU-8505__93476.1682435252.1280.1280.jpg?v=1775682440","url":"https:\/\/www.empirepro.com\/products\/neumann-u-87-ai-stereo-set","provider":"Empire Pro","version":"1.0","type":"link"}