Shure 503BG Microphone User Guide

Model 503BG User GuideMODEL 503BGUnidirectional Dynamic MicrophoneSPECIFICATIONSTypeDynamic, unidirectional (cardioid), close-talkingFrequency Response100 to 7,000 Hz (Figure 1)dB1 cm*5 cm*ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑDeveloped for computer voice recognition applications,the 503BG microphone offers excellent voice fidelity whilereducing background noise. Also use the 503BG in otherclose-talking applications such as paging and talkback.The 503BG features a low-impedance, moving coil typetransducer with an integral humbucking coil and an attachedtwo-conductor shielded cable with a built-in strain relief. Itproduces a frequency response with an essentially constantoutput voltage over the voice spectrum when used close tothe sound source.The 503BG’s case is aluminum with a black enamel finish.It mounts to a gooseneck, a fixed pipe or a microphone standusing a standard 5/8”-27 thread. To secure the mountedBG503, tighten the 4-40 screw with the supplied #4 Allen (hexhead)wrench.Features Optimized performance in voice processing andcomputer voice recognition applications.Smooth frequency response with excellent fidelityin the voice range.Cardioid pickup pattern and close-talking operationkeep unwanted signals and background noiseat low levels.Constant output over voice spectrum when closetalked.Humbucking coil minimizes undesirable humeffects such as CRT interference.Low-impedance design permits long cable runs inextreme hum fields.Small unobtrusive design does not interfere withCRT visibility.Rugged and reliable for years of consistentoperation.Hz* distance from speaker to microphone grilleTYPICAL FREQUENCY RESPONSEFIGURE 1Impedance170 ohms actualOutput Level (Open Circuit Voltage)–61.5 dBV/Pa (.84mV)*–41.5 dB (8.4 mV)***1 Pa = 94 dBSPL**0 dB = 1V/100 µbarPolarityPositive pressure on diaphragm produces positive voltageon white conductor with respect to black conductor (Figure 2)INTERNAL CONNECTIONSFIGURE 2Hum PickupMaximum 15 dB equivalent SPL in m0e fieldCable1.2 m (4 ft) two-conductor shieldedCaseAluminum with black enamel finish; stainless steelscreen.©2007 Shure Incorporated27C8091 (Rev. 7)Printed in U.S.A

Net Weight128 g (4.5 oz)DimensionsSee Figure 3OVERALL DIMENSIONSFIGURE 3OperationFor best performance, speak as close to the 503BG as comfortpermits. A distance of 1 to 5 cm (0.4 to 2 inches) providesthe greatest discriminations between voice and backgroundnoise.Acoustic ConsiderationsThe 503BG maximizes performance in close-talking applicationsthrough its tailored frequency response, directionality anddistance discrimination. It optimizes and controls sounds withinthe 100 to 7000 Hz frequency range and reduces sounds outsidethat range. The BG503 rejects noise through its inherentdirectional properties and discriminates against distant soundsin favor of close-range sounds.OPTIONAL ACCESSORIESIn-Line On-Off-Momentary Switch . . . . . . . . . . . . . . A120S12-Inch Gooseneck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G1218-Inch Gooseneck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G186-Inch Gooseneck (Side Vent) . . . . . . . . . . . . . . . . . . . . . G6A18-Inch Gooseneck (Side Vent) . . . . . . . . . . . . . . . . . . . G18A12-Inch Gooseneck (Side Vent, 3-Pin Conn.) . . G12-CN18-Inch Gooseneck (Side Vent, 3-Pin Conn.) . . G18-CNMounting Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A12Heavy-Duty Mounting Flange . . . . . . . . . . . . . . . . . . . A13HDSHURE Incorporated http://www.shure.comUnited States, Canada, Latin America, Caribbean:5800 W. Touhy Avenue, Niles, IL 60714-4608, U.S.A.Phone: 847-600-2000 U.S. Fax: 847-600-1212 Intl Fax: 847-600-6446Europe, Middle East, Africa:Shure Europe GmbH, Phone: 49-7131-72140 Fax: 49-7131-721414Asia, Pacific:Shure Asia Limited, Phone: 852-2893-4290 Fax: 852-2893-4055