2
Custom Switch Modifications
S4 is available for custom logic modifications. When S4 is in
the ON position, pad W4 is connected to pad W5.
NOTE: For technical data by Fax, phone 1-800-488-3297 and
follow the recorded instructions. For additional technical assis-
tance, phone Shure at (847) 866-2200. In Europe, phone
49-7131-72140.
REPLACEMENT PARTS AND ACCESSORIES
Snap–Fit Foam Windscreen (4 per pkg.)
RK412WS
. . . . . .
Foam Ball Windscreen (4 per pkg.)
A99WS
. . . . . . . . . . . . . .
Locking Metal Windscreen
A412MWS
. . . . . . . . . . . . . . . . . . .
Replacement 3 m (10 ft) XLR Cable
C120
. . . . . . . . . . . . . . .
Custom Logic Cable (specify length)
15A523/1
. . . . . . . . . . .
Omnidirectional Cartridge
R183B
. . . . . . . . . . . . . . . . . . . . . .
Supercardioid Cartridge
R184B
. . . . . . . . . . . . . . . . . . . . . . .
Cardioid Cartridge
R185B
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Base Plate Bumpers
80A8053A
. . . . . . . . . . . . . . . . . . . . . . . .
DESIRED MICROPHONE FUNCTION
USER ACTION/LED DISPLAY
DIP SWITCH SETTINGS
Push to Mute (As Shipped)
Press and hold switch to temporarily mute micro-
phone; release switch to unmute
LED turns on when microphone is active
S1 = OFF
S2 = OFF
S3 = OFF
Push to Talk
Press and hold switch to activate microphone; re-
lease switch to mute
LED turns on when microphone is active
S1 = OFF
S2 = ON
S3 = OFF
Push On/Push Off
Press switch to toggle microphone on or off
LED turns on when microphone is active
S1 = ON,
S2 = ON for muted initial state
S2 = OFF for active initial state
S3 = OFF
Switch Deactivated, Mic Always Active
No action, LED Always OFF
S3 = ON
Switch Deactivated, Mic Always Active
Short LED IN terminal to LOGIC GROUND terminal
LED Always ON
S3 = ON
Automatic Mixer Mode
If S1=OFF, SWITCH OUT signal will be momentarily
logic low when switch is pressed
If S1=ON, SWITCH OUT signal will be latching logic
low when switch is pressed
Connect SWITCH OUT signal to various logic inputs
of automatic mixer for custom functions
Connect mixer channel GATE OUT to microphone
LED IN. LED on microphone turns on when its
channel is gated on
S1 = ON or OFF
S3 = ON
SPECIFICATIONS
Frequency Response (Figure 3)
50 to 17,000 Hz
Polar Pattern (Figure 4)
Output Impedance
EIA Rated at 150
Ω (
180
Ω
actual)
Open Circuit Sensitivity
At 1 kHz, ref. 1 V per microbar*
Cardioid: –53.5
dBV
(2.11
mV)
Supercardioid: –52.5
dBV
(2.37
mV)
Omnidirectional: –48.0 dBV (3.98 mV)
*1 microbar = 74 dB SPL
At 1 kHz, ref. 1 V per Pascal
Cardioid: –33.5
dBV
(21.1
mV)
Supercardioid: –32.5
dBV
(23.7
mV)
Omnidirectional: –28.0 dBV (39.8 mV)
*1 Pascal = 94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1 k
Ω
load)
Cardioid:
123.0 dB
Supercardioid: 122.0
dB
Omnidirectional:
117.5 dB
Equivalent Output Noise (A-weighted)
Cardioid:
29.0 dB SPL
Supercardioid:
28.0 dB SPL
Omnidirectional:
23.6 dB SPL
Signal to Noise Ratio (referenced at 94 dB SPL)
Cardioid:
65.0 dB
Supercardioid:
66.0 dB
Omnidirectional:
70.5 dB
Dynamic Range with 1 k
Ω
Load
94.0 dB
Common Mode Rejection
45.0 dB minimum
Mute Switch Attenuation
50.0 dB minimum
Preamplifier Output Clipping Level (1% THD)
–6.0 dBV (0.5 V)
Polarity
Positive sound pressure on diaphragm produces
positive voltage on pin 2 relative to pin 3 of XLR
output connector.
Power Requirements
11 to 52 Vdc phantom, 2.0 mA
Environmental Requirements
Operating Temperature Range: –18
°
to 57
°
C (0
°
to 135
°
F)
Relative Humidity: 0 to 95%
Dimensions (Figure 5)
Weight
0.81 kg (1.80 lbs) net
1.25 kg (2.77 lbs) packaged
Cable Type
The attached custom cable contains a shielded audio
pair and three unshielded conductors for logic control.
Overall diameter = 0.6 mm (0.165 in.)
Certification
Conforms to European Union directives, eligible to
bear CE marking; meets European Union EMC
Immunity Requirements (EN 50 082–1, 1992); RF
radiated (IEC 801–3); ESD (IEC 801–2); EFT (IEC
801–4).
