By: Shure
Microphones, Headphones & Wireless systems
Contact us for lowest price (800) 284-2288, (858) 565-1101,, or fax (858) 300-4193
“Close-Talk” Voice Communication Microphone
The Shure Specialty to General Communications Microphone Series 503 BG offers excellent voice fidelity while reducing background noise. Also use the 503BG in other close-talking applications such as paging and talkback.

The 503-BG features a low-impedance, moving coil type transducer with an integral humbucking coil and an attached two-conductor shielded cable with a built-in strain relief. It produces a frequency response with an essentially constant output voltage over the voice spectrum when used close to the sound source.

The 503BG’s case is aluminum with a black enamel finish. It mounts to a gooseneck, a fixed pipe or a microphone stand using a standard 5/8”-27 thread. To secure the mounted BG503, tighten the 4-40 screw with the supplied #4 Allen (hexhead) wrench.
Optimized performance in voice processing and computer voice recognition applications
Smooth frequency response with excellent fidelity in the voice range
Cardioid pickup pattern and close-talking operation keep unwanted signals and background noise at low levels
Constant output over voice spectrum when close talked
Humbucking coil minimizes undesirable hum effects such as CRT interference
Low-impedance design permits long cable runs in extreme hum fields
Small unobtrusive design does not interfere with CRT visibility
Rugged and reliable for years of consistent operation
Type Dynamic, unidirectional (cardioid), close-talking
Frequency Response 100 to 7,000 Hz
Impedance 170 ohms actual
Output Level (Open Circuit Voltage) –61.5 dBV/Pa (.84mV)*; –41.5 dB (8.4 mV)**; *1 Pa = 94 dBSPL; **0 dB = 1V/100 mbar
Polarity Positive pressure on diaphragm produces positive voltage on white conductor with respect to black conductor
Hum Pickup Maximum 15 dB equivalent SPL in m0e field
Cable 1.2 m (4 ft) two-conductor shielded
Case Aluminum with black enamel finish; stainless steel screen
Net Weight 128 g (4.5 oz)

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Prices and specifications subject to change without notice.