{"product_id":"classic-unidynei-instrument-microphone","title":"Classic Unidyne�Instrument Microphone","description":"\u003cp\u003eThe predecessor to the SM57, The 545SD Classic Unidyne�Instrument Microphone is a dual-impedance, unidirectional, dynamic microphone.\u003cbr\u003e\u003cbr\u003eShipped connected for low-impedance operation, the 545SD features a silent magnetic reed on\/off switch with lock-on option. A favorite for instrument pickup and recording, the 545SD can also be used on lecterns in public address systems.\u003cbr\u003e\u003cbr\u003eType\u003cbr\u003eDynamic\u003cbr\u003e\u003cbr\u003eFrequency Response\u003cbr\u003e50 to 15,000 Hz\u003cbr\u003e\u003cbr\u003ePolar Pattern\u003cbr\u003eCardioid (unidirectional)--uniform with frequency, symmetrical about axis\u003cbr\u003e\u003cbr\u003eImpedance\u003cbr\u003eDual. Microphone rating impedance is 150 ohms (250 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms and \"High\" for connection to high-impedance microphone inputs. Wired for low impedance as supplied. To change impedance, see sections on lmpedance Selection and Connections in User Guide.\u003cbr\u003e\u003cbr\u003eOutput Level (at 1,000 Hz)\u003cbr\u003eLOW: Open Circuit Voltage* -58.0 dB (1.3 mV)\u003cbr\u003eHIGH: Open Circuit Voltage* -35.0 dB (17.6 mV)\u003cbr\u003e*0 dB = 1 volt per Pascal (1 Pa = 94 dB SPL)\u003cbr\u003e\u003cbr\u003ePolarity\u003cbr\u003ePositive pressure on diaphragm produces positive voltage on pin 2 (with respect to pin 3).\u003cbr\u003e\u003cbr\u003eSwitch\u003cbr\u003eBuilt-in magnetic reed on\/off switch with lockplate.\u003cbr\u003e\u003cbr\u003eCartridge Shock Mount\u003cbr\u003eInternal rubber vibration-isolator Swivel Adapter\u003cbr\u003ePositive action, adjustable through 90 degrees from vertical to horizontal, permits easy removal for handheld use, suitable for mounting on stand with 5\/8\"- 27 thread\u003cbr\u003e\u003cbr\u003eCase\u003cbr\u003eChrome-plated die casting with ARMO-DUR�grille and stainless steel screen\u003cbr\u003e\u003cbr\u003eNet Weight (less cable)\u003cbr\u003e255 grams (9 oz)\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUniform cardioid pattern\u003c\/li\u003e\n\u003cli\u003eSelectable dual-impedance operation\u003c\/li\u003e\n\u003cli\u003eLockable on\/off switch\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shure","offers":[{"title":"Default Title","offer_id":51790223802664,"sku":"NGTMP-545SD-LC","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/0406\/3016\/files\/545SD-LC.jpg?v=1777929920","url":"https:\/\/churchgear.com\/products\/classic-unidynei-instrument-microphone","provider":"ChurchGear","version":"1.0","type":"link"}