Electro-Voice TR420 User's Manual
Contents
1. SPECIFICATIONS Element Dynamic Frequency Response 60 13 000 Hz see F Polar Pattern Cardioid see Figure 3 Impedance 300 ohm bal Output Level dB 0 dB 1 10 dynes cm2 EIA Sensitivity T MA 54d a cdi Acoustalloy Case 41n Finish Armourmatte gure 2 Dimensions 157 2 mm 6 19 in long 50 0 mm 1 97 in largest diameter ba 8 zippered protective vinyl carrying pouch Optional Accessories 351 grey windscreen 379 color coded windscreens rof onnector at m rofessional Sabian 1 type connecto gt ft oroles onal cable with onnector at mike end 544 50 ft professional cable with A3F amp A3M type connectors ional geo with DESCRIPTION amp APPLICATIONS The Electro Voice Model TR420 features high output level while providing a smooth frequency response and excellent gain before feedback characteristics The Model TR420 is a Single D cardioid microphone which emphasizes low frequencies when used ose up Perfect for the exacting needs of high quality sound reinforce ment public address and other applications the TR420 is ruggedly designed and attractively styled The TR420 uses the broadcast standard three pin type connector A new head design provides exception ally wide linear response for high gain before feedback in sound reinforcement applications The head subassembly is user replaceable As part of this eae an ex2. dency to feedback The variable low frequency response provides a further feedback reducing advantage in close talking applica tions At 1 4 inch low frequency response is greatly enhanced while response to distant sound as from sound system loudspeakers is unaffected The result is a reduced tendency to feedback over and above that provided by the cardioid directional characteristic alone 157 2 mm 6 19 in FIGURE 1 1 97 ind Dimensions FIGURE 2 Frequency Response FIGURE 3 Polar Response FIGURE 4 Wiring Diagram Lo Z Gulton Industries Inc 1983 In short system sensitivity reduction because of close working added to the advantage resulting from the bass boosting low frequency characteristic of the TR420 makes this instrument an exceptionally effective tool for stage and nightclub use 3 For musical pickup the variable bass response can be utilized to achieve clean bass pickup at distances of 24 inches or more By moving the TR420 to a few inches from the instrument bass will be increased WARRANTY Limited Electro Voice TR Microphones are guaranteed unconditionally against mal function from any cause for a period of two years from date of original purchase If such malfunction occurs microphone will be repaired or replaced at our option without charge for materials or labor if delivered prepaid to the proper Electro Voice service facility Uni
3. t will be returned prepaid Warranty does not cover finish appearance items cable cable connectors or switches Repair by other than Electro Voice or its authorized service agencies will void this guarantee For repair information and service locations please write Service Dept Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 Phone 616 695 6831 or Electro Voice West 8234 Doe Avenue P O Box 3297 Visalia CA 93277 Phone 209 651 7777 Electro Voice also maintains complete facilities for mon warranty service of EV products Specifications subject to change without notice Part Number 530380 350 a GUIEON cowan ELECTRO VOICE Inc 600 CECIL ST BUCHANAN MICH 49107 MANUFACTURING PLANTS AT B BUCHANAN MICH B NEWPORT TENN B SEVIERVILLE TENN BE GANANOQUE ONT LITHO IN U S A
4. tremely effective shock bsorber isolates the transducer menitly from mechanical noises An internal A talking without excessive P popping and prevents dirt and magnetic particles from accumulating on the diaphragm Using The Variable Low Frequency Response The 7 TR420 ow frequency response varies with the distance from the sound to the microphone as shown in the response curve Figure 2 Maximum bass response is produced in close up use with the microphone 1 4 inch from the sound source Figure 2A Minimum coustifoam filter allows close Electro Voice a gultan company Model 1R420 Dynamic cat Microphone bass response is experienced at distances greater than 24 inch Fig 2C Useful special effects can be created by an imaginative application of the variable low frequency response 1 By working closer to the micro phone the human voice will sound more robust although intelligibility may be adversely affected N Feedback in a public address system is sustained by reflection of sound into the microphone For all micro phones as the artist moves closer the level of his voice at the micro phone increases and the micro phone s signal to the amplifier is increased For a constant volume of sound from the system the amplifier gain setting must be proportionately reduced This results in a reduction of the system s sensitivity to reflect ed sound hence a reduction of the ten
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