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— SHURE
GENERAL MODEL 579SB VOCAL SPHERE
The Model 579SB is designed to provide natural and OMNIDIRECTIONAL DYNAMIC MICROPHONE
intelligible voice reproduction with freedom from annoy- на
ing wind and breath noises. This slim, neat-appearing
microphone is a very rugged unit built to withstand the
severest field use. The performance, small size, and
ruggedness make the Vocal Sphere an ideal choice for
public address, theater-stage sound systems, meeting
rooms, recording, and other field and studio applica-
tions.
Features:
E Smooth, natural-sounding response from 50 to
14000Hz
m Slender design, lightweight, well balanced for hand ©
use Frequency Response
m Built-in wind and “pop” filter to minimize breath and 50 to 14,000 Hz (see Figure 1)
wind noise Polar Pattern
m Built-in On-Off switch with lockplate to lock switch Omnidirectional
in On position Impedance
Microphone rating impedance is 150 ohms (200 ohms
actual) for connection to microphone inputs rated at
19 to 300 ohms
Output Level (at 1,000 Hz)
-< mM Rugged construction for completely dependable
| operation under all conditions
m Versatility —equally useful in the field, stage, or
studio — handheld, or on a stand
Open circuit voltage ......... —78.5dB* (0.13 mV)
The Model! 579SB Microphone is supplied with an ad- Power level ................. —57.0dB**
justable swivel adapter to fit a 947-27 thread. This swivel *0 dB = 1 volt per microbar
permits “quick-disengage” for use as a hand-held micro- **0 dB = 1 milliwatt per 10 microbars
phone. Phase
The Model 579SB is low impedance for connection to Positive pressure on diaphragm produces positive
microphone inputs rated at 19 to 300 ohms. For use with voltage on pin 2 with respect to pin 3
high-impedance amplifiers, a Shure Model A95 Series
Line Matching Transformer is available for coupling the CARTRIDGE SWITCH CONNECTOR
low-impedance line to the amplifier input. Model 579SB-
LC is supplied without cable. YELLOW
SPECIFICATIONS al
Type a
Dynamic POSITIVE PRESSURE ON DIAPHRAGM PRODUCES POSITIVE
VOLTAGE AT PIN 2 WITH RESPECT TO PIN 3.
INTERNAL CONNECTIONS
FIGURE 2
+
Switch
Built-in On-Off switch with lockplate furnished. Ship-
ped with lockplate installed. To lock switch in On
position, place in On position, loosen screw on
lockplate, and turn lockplate 180°. Retighten screw
RELATIVE RESPONSE IN dB.
1
3 o
FREQUENCY IN HERTZ Swivel Adapter
Snap-in positive-action, adjustable from 0° to 90”,
TYPICAL FREQUENCY RESPONSE with standard %&”-27 thread
FIGURE 1
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INOHdOUOIN DINVNAG T1YNOILIIYICINNO
222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202-3696 U.S.A.
Copyright 1993, Shure Brothers Inc.
27A2293 (MB) Printed in U.S.A.
Case
Champagne beige finish with platinum beige grille
Dimensions
See Figure 3
162 mm
(6-3/8 IN)
175 mm— 34) mm Г
(11/16 IN) (1-11/32 IN)
397 mm
(1-9/16 IN)
> Ea ° |
_ DS —
(3/4 IN)
OVERALL DIMENSIONS
FIGURE 3
Net Weight (less cable)
156 grams (5% 07)
Packaged Weight
387 grams (13% oz)
PHASING
To test two microphones and/or their cables for pro-
per phasing, connect them to an amplifier and talk or
sing into them while holding them three or four inches
apart. The sound from the speakers should be the same
when talking into either microphone or directly between
them if they are in phase with each other. If the sound
drops drastically, or if a dead spot is found when talking
between the two microphones, one of them or its cable
(low impedance only) is out of phase. All cables and
microphones should be tested in this manner to insure
that they are in phase with each other.
To change the phase of a low-impedance microphone
cable, either use a Shure A15PRS Phase Reverser or in-
terchange the wires connected to pins 2 and 3 of the
connector. To change the phase of a microphone, the
microphone cartridge leads must be interchanged (see
Figure 2). This should be performed by your dealer, the
Shure Factory Service Department, or other qualified
service personnel.
ARCHITECTS’ SPECIFICATIONS
The microphone shall be a moving-coil (dynamic) type
with a frequency response of 50 to 14,000 Hz. The unit
shall have an omnidirectional polar characteristic. The
microphone rating impedance shall be 150 ohms for
connection to microphone inputs rated at 19 to 300
ohms. The microphone output shall be —57.0 dB where
0 dB = 1 milliwatt per 10 microbars.
The microphone shall be equipped with a built-in On-
Off switch. A swivel adapter, adjustable through 90°
from vertical to horizontal and suitable for mounting on
a stand having a %”-27 thread, shall also be provided.
The overall dimensions of the microphone shall be 162
mm (6% in.) in length and 39.7 mm (1-916 in.) in
diameter.
The microphone shall be a Shure Model 579SB or
equivalent.
FURNISHED ACCESSORY
Swivel Adapter ........ an 0 A57D
OPTIONAL ACCESSORIES
Line Matching Transformer .............. A95 Series
Windscreen ............eeeseroroooneren. A58WS
Desk Stand ............. ci... S37A, S39A
Isolation Mount ..................... A53M, A53HM
Cable (6.1m —=20ft) ......................... C20H
Cable (6.1m —20 ft, mic connector only) ........ C20D
REPLACEMENT PARTS
Dynamic Cartridge ............. oo... R50
Screen and Grille Assembly ................ RK221G
Switch Assembly .......................... RK895
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