Shure 547 User Guide

The microphone is recommended where long cable lengths are required or under conditions of severe hum disturbance. The permissible cable length is practically unlimited, since neither response nor level is appreciably affected. For use with high impedance amplifiers, Shure Model A95A Line Matching Transformer is available for coupling the low impedance line to the amplifier input. The Shure Model A95A transformer permits coupling a low impedance line to the high impedance input.

FURNISHED ACCESSORIES

Case	..............................................................................................................................A49C

OPTIONAL ACCESSORIES

Line Matching Transformer........................................................................................	A95A
Vibration-Isolation Stand ............................................................................................	S39A
Desk Stand ....................................................................................................................	S33B
Quick Disconnect Isolation Unit..............................................................................	A45
Windscreen Assembly ................................................................................................	A2WS

GUARANTEE:

Each microphone is guaranteed to be free from electrical and mechanical defects for a period of one year from date of shipment from factory, provided all instructions are complied with fully. In case of damage, return the microphone to the factory for repairs. Our guarantee is voided if the microphone is subjected to accident or abuse.

MODEL 547

ARCHITECT'S SPECIFICATIONS

The microphone shall be Shure Model 547 or equivalent. A moving coil (dynamic) microphone with a frequency range of 40 to 15,000 Hz., this unit shall have a cardioid polar characteristic. The cancellation a t the sides shall be approximately 6db and the cancellation a t the rear shall be 15 to 20 db. The microphone shall be equipped with a three-position impedance "Off" switch for adjusting the microphone rating impedance for 50 ohms-150 ohms. (EIA Rating Impedance: 38 ohms-150 ohms.)

The microphone output shall be:

50 ohms impedance -56	db
( 0 db = 1 milliwatt with	10 microbars)
250 ohms impedance -56	db
( 0 db = 1 milliwatt with 10 microbars)
The microphone rating Gm	(sensitivity) a t 1,000 Hz. shall be within	-+ 3 d b of
the following levels.
Low Impedance ........................................................................	-149	db
Medium Impedance ..................................................................	-148	db

EIA Standard SE-105 August 1949

The microphone shall be provided with a swivel adjustable through 180.' The microphone shall be equipped with a vibration-isolation unit in combination with the stand connector. The microphone will mount on a stand having 5/8"-27 thread.

The overall dimensions shall be 429$2" (124.7 mm) in height, 1%" (34.9 mm) in width, and 6%" (155.5 mm) in depth.