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Polarity
Positive pressure on diaphragm produces positive voltage on
pin 2 (with respect to pin 3). See Figure 4.
Switch
Built-in magnetic reed on/off switch with lockplate. To lock
switch in the ON position, remove screw on lockplate and turn
lockplate 180°. Reassemble and tighten screw.
Cartridge Shock Mount
Internal rubber vibration-isolator
Swivel Adapter
Positive action, adjustable through 90° from vertical to horizon-
tal, permits easy removal for handheld use, suitable for mount-
ing on stand with 5/8"–27 thread
Case
Chrome-plated die casting with ARMO-DUR
less steel screen
Dimensions
See Figure 5
Net Weight (less cable)
255 grams (9 oz)
CERTIFICATION
Eligible to bear CE Marking. Conforms to European EMC Directive
89/336/EEC. Meets applicable tests and performance criteria in
European Standard EN55103 (1996) parts 1 and 2, for residential
(E1) and light industrial (E2) environments.
FURNISHED ACCESSORY
Swivel Adapter ..................................................................A25D
REPLACEMENT PARTS
Cartridge .............................................................................. R45
Plug Element................................................................. RK169P
Screen and Grille ..........................................................RPM210
+10
0
--10
2
20
50
100
TYPICAL FREQUENCY RESPONSE
REED
CARTRIDGE
SWITCH
CODED TERMINAL
GREEN
BLACK
YELLOW
INTERNAL CONNECTIONS
FIGURE 4
®
grille and stain-
3
4
5
6
7
8
9
2
3
4
5
6
7
8
1000
10000
Hz
FIGURE 2
TRANSFORMER
XLR CONNECTOR
GREEN
RED
BLUE
WHITE
YELLOW
BLACK
BLACK
IMPEDANCE SELECTION SOCKET
(SHOWN IN LOW IMPEDANCE POSITION)
OPTIONAL ACCESSORIES
Line Matching Transformer........................................A95 Series
Desk Stand .............................................................S37A, S39A
Isolation Mount .................................................................. A55M
Dual Mount ........................................................................ A26M
Windscreen ............................................................. A2WS-GRA
Cable, LO–Z (7.6 m [25 ft])................................................. C25J
Cable, HI–Z (6.1 m [20 ft]) ............................................... C20HZ
ARCHITECTS' SPECIFICATIONS
The microphone shall be a moving coil (dynamic) type with a
frequency response of 50 to 15,000 Hz. The unit shall have a
cardioid polar characteristic. The cancellation at the sides shall be
approximately 6 dB, and the cancellation at the rear shall be 15 to
20 dB. The microphone shall be dual impedance with a rated
impedance of 150 ohms for connection to microphone inputs rated
at 19 to 300 ohms and "High" for connection to high-impedance
microphone inputs. lmpedance change shall be solderless at the
microphone connector.
The microphone output shall be:
Low lmpedance .............................................................-58.0 dB
High lmpedance ............................................................-35.0 dB
The microphone shall have an XLR, three-pin professional audio
connector and shall be equipped with a magnetic reed On-Off
switch.
The microphone shall be provided with a swivel adapter, adjustable
through 90° from vertical to horizontal, and suitable for mounting
on a stand having a 5/8"–27 thread.
The overall dimensions of the microphone shall be 157 mm (6-3/16
in.) in length and 31.9 mm (1 1/4 in.) in diameter.
The microphone shall be the Shure Model 545SD-LC or
equivalent.
150
o
120
o
90
o
60
9
30
20000
32 mm
(1 1/4 in.)
2
(0 dB = 1 volt per Pascal)
(0 dB = 1 volt per Pascal)
o
180
o
150
o
o
120
120
o
o
90
90
--20 dB
--15 dB
o
60
60
--10 dB
--5 dB
o
o
30
0
125 Hz
500 Hz
1000 Hz
TYPICAL POLAR PATTERNS
FIGURE 3
157 mm
(6 3/16 in.)
64 mm
(2 1/2 in.)
OVERALL DIMENSIONS
FIGURE 5
o
180
o
o
150
150
o
o
120
90
--20 dB
--15 dB
o
o
60
--10 dB
--5 dB
o
o
30
30
0
2000 Hz
4000 Hz
8000 Hz
94 mm
(3 11/16 in.)
23 mm
(15/16 in.)
o
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