{"product_id":"microflex-series-compact-boundary-microphone-black-supercardioid","title":"Microflex Series Compact Boundary Microphone (Black, Supercardioid)","description":"\u003cp\u003eMicroflex�Boundary Microphones are the high-quality solution for a range of applications such as altars, boardrooms and distance learning centers. Every Microflex Boundary microphone features a choice of interchangeable condenser cartridges.\u003cbr\u003e \u003cbr\u003e The MX391 includes an attached 4 meter (12 ft) cable terminated with a 4-pin mini connector and separate preamplifier. A rubber strain relief is provided for applications that require removing the 4-pin mini connector and connecting the mic cable directly to screw terminals in the preamplifier.\u003cbr\u003e \u003cbr\u003e Environmental Requirements\u003cbr\u003e Operating Temperature Range: -18 to 57 degrees C (0 to 135 degrees F)\u003cbr\u003e Relative Humidity: 0 to 95%\u003cbr\u003e \u003cbr\u003e All measurements taken with the microphone mounted on a 76.2 cm x 76.2 cm (30 in. x 30 in.) wooden surface and with the sound source incident at 30 degrees with respect to the surface plane.\u003cbr\u003e \u003cbr\u003e Frequency Response\u003cbr\u003e 50 to 17,000 Hz\u003cbr\u003e \u003cbr\u003e Output Impedance (at 1000 Hz)\u003cbr\u003e 180 ohms actual (rated at 150 ohms)\u003cbr\u003e \u003cbr\u003e Open Circuit Sensitivity 1 kHz ref. 1 V per Pascal *\u003cbr\u003e Supercardioid: -28.3 dB (38.5 mV)\u003cbr\u003e All settings -12 dB at 0 gain; *1 Pascal = 94 dB SPL\u003cbr\u003e \u003cbr\u003e \u003cbr\u003e Maximum Sound Pressure Level (1 kHz at 1% Total Harmonic Distortion, 1 k ohm load)\u003cbr\u003e Supercardioid: 117.5 dB\u003cbr\u003e All settings +6 dB at 0 gain\u003cbr\u003e \u003cbr\u003e Signal to Noise Ratio (referenced at 94 dB SPL)\u003cbr\u003e Supercardioid: 72.7 dB\u003cbr\u003e \u003cbr\u003e Equivalent Output Noise (A-weighted)\u003cbr\u003e Supercardioid: 21.3 dB SPL\u003cbr\u003e \u003cbr\u003e Dynamic Range at 1 k ohm Load\u003cbr\u003e 96.2 dB\u003cbr\u003e 100 dB at 0 gain\u003cbr\u003e \u003cbr\u003e Common Mode Rejection\u003cbr\u003e 45 dB minimum, 10 Hz to 100 kHz\u003cbr\u003e \u003cbr\u003e Preamplifier Output Clipping Level\u003cbr\u003e -6 dBV (0.5 V)\u003cbr\u003e 12 dB at 0 gain\u003cbr\u003e \u003cbr\u003e Polarity\u003cbr\u003e Positive sound pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 of the preamplifier XLR output connector.\u003cbr\u003e \u003cbr\u003e Power Requirements\u003cbr\u003e 11 to 52 Vdc phantom\u003cbr\u003e 2.0 mA current consumption\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFlat frequency response across the vocal range for uncolored sound\u003c\/li\u003e\n\u003cli\u003eSleek, low-profile design for unobtrusive appearance\u003c\/li\u003e\n\u003cli\u003eInterchangeable cardioid, supercardioid, and omnidirectional cartridges that provide optimal choice for each application\u003c\/li\u003e\n\u003cli\u003eBalanced, transformerless output for increased immunity to noise over long cable runs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shure","offers":[{"title":"Default Title","offer_id":51790369063208,"sku":"NGTMP-MX391\/S","price":252.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/0406\/3016\/files\/MX391_252FS.jpg?v=1777931485","url":"https:\/\/churchgear.com\/products\/microflex-series-compact-boundary-microphone-black-supercardioid","provider":"ChurchGear","version":"1.0","type":"link"}