Electro-Voice N/D457 User's Manual
Contents
1. card enclosed with microphone or write for complete details ELECTRO VOICE INC 600 Cecil Street Buchanan Michigan 49107 MANUFACTURING PLANTS AT W BUCHANAN M W NEWPORT TN W SEVIERVILLE TN W REDMOND WA E GANANOQUE ONT Electro Voice Inc 1987 Litho In USA Part Number 530838 729 a MARK IV company C2. of many directional microphones Thus closer working distances can be used with N D457 to reduce the risk of sound system feedback ringing to an absolute minimum while preserving intelligibility The dynamic element of the N D457 will provide reliable operation in humidity and temperature extremes adverse conditions that would render condenser microphones useless For years of trouble free operation on the road the N D457 utilizes an all metal core construction from the hardened windscreen to the Warm Grip covered handle Patent Pending CERTIFIED PERFORMANCE Every N D457 is inspected by a quality control technician and subjected to a computer controlled test system that verifies over 80 different performance parameters After the performance meets or exceeds our rigorous standards the actual measured frequency response of the unit tested is plotted on a Certificate of Performance and included with the microphone This certificate guarantees that each N D457 will perform to the exacting standards established by EV design engineers 100 quality assurance testing WARRANTY LIMITED Electro Voice N D Series Microphones are guaranteed against malfunction from any cause for a period of two years from date of original purchase Also these microphones are guaranteed without time limit against malfunction in the acoustic system due to defects in workmanship and material Other provisions apply please see warranty
3. Ey Elecho Voice N D Series MUSIC MICROPHONES Hypercardioid Dynamic Vocal Microphone FR yyy gt APAN RARES The Electro Voice N D457 is a hypercardioid dynamic microphone utilizing a revolutionary neodymium alloy to form the EV exclusive N DYM magnet with four times the power potential of conven tional microphone magnets With a computer optimized design the N DYM magnetic structure is maximized in the N D457 to provide up to 6 dB more output sensitivity over conventional designs while the more uniform magnetic field lowers distortion during peak sound pressure levels Ry yas The large diaphragm contains 50 percent more surface area than conventional designs and is reinforced to prevent breakup The result is an extended high frequency response with an open transparent sound quality The exceptional sensitivity of the N D457 combined with the inherently low noise of a dynamic transducer insures a superior signal to noise ratio ready for digital recording and sampling To further reduce noise a highly effective hum bucking coil is used to cancel hum from lighting and other sources SE ER EE The N D Series design also features a unique shock mount totally surrounding the microphone element Combined with the elastomeric Warm Grip handle and windscreen bumper this vibration isolation system greatly reduces all forms of handling noise An Acoustifoam pop filter is included to reduce both wind n
4. oise and p pop breath sounds The uniform hypercardioid polar pattern of the N D457 insures superior gain before feedback in live applications and better isolation in the studio at all frequencies compared with other directional microphones with widely varying polar characteristics FREQUENCY RESPONSE a 500 1000 2000 5000 10000 20000 FREQUENCY IN HERTZ SPECIFICATIONS Frequency Response Close Response Far Response Polar Pattern Open Circuit Voltage Sensitivity Dynamic Range Equivalent Output Noise Impedance Weight Dimensions Height Diameter Shank 25 to 21 000 Hz 55 to 18 000 Hz hypercardioid 3 1 mV Pascal 1000 Hz 50 dB where 0 dB 1 mW 10 dynes cm 144 dB 14 dB 0 dB 0002 dyne cm 150 ohms balanced Lo Z 7 05 ounces 200 grams 7 12 inches 181 mm 2 05 inches 52 mm 0 80 inch 20 mm N D 457 The N D457 has been specially tuned to provide exceptional off axis rejection and gain before feedback for live lips touching applica tions The high and low frequency response of the N D457 is extended in this position as documented by the specification section This baffle and proximity effect begins when the microphone is placed within 12 inches of the sound source and increases as the working distance is reduced The low frequency response is tailored to provide bass boost without the boominess
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