Shure SM14 User Guide
@H
222
-44
HARTREY AVE., EVANSTON,
The Shure Model SM14 Professional Head-Worn Mi-
crophone with Receivers is a low-impedance, unidirectional, dynamic microphone with two integral earphone
assemblies. Each receiver assembly has its own
transformer and phone plug for monitoring separate
sound sources. Designed for sports and news announcing, interviewing and intercommunication systems, and for special-events remote broadcasting, the
SM14 offers convenient,
user fatigue. A close-talking microphone, the SM14
may be used under noisy conditions without loss or
masking of voice signals. The
weight, rugged and reliable unit, with provisions for
mounting to a supplied cushioned headband. A pivot
housing permits the microphone boom to be moved
20" in any direction, and the distance between the
microphone and pivot to be changed by up to 89 mm
in.). The receiver ear tubes, attached to the bot-
(3Yz
toms of the pivot housings, may be moved through a
55"
arc. A miniature windscreen to protect against
wind noise and explosive breath sounds, and three
connector belt clips are also supplied.
Model SM14 Features:
Close-talk operation and unidirectional polar pattern for effective noise reduction
Smooth natural voice frequency response
Locking adjustment knob permits boom to pivot
20" in any direction
Boom length adjustment through 89 mm (3% in.)
range
Twin receivers monitor separate sound sources
Receiver ear tubes adjustable through
Light weight plus padded headband eliminate user
fatigue
Does not interfere with eyeglasses
Ruggedly constructed of stainless steel, aluminum
and high-impact thermoplastic
Convenient, secure clips attach connectors to belt
or clothing
-
IL.,
GENERAL
hands-free operation without
SM14 is a small, light-
PROFESSIONAL PRODUCTS
60204
55"
U.S.A.
arc
DATA]
.
AREA CODE 312/866-2200 CABLE: SHUREMICRO
ASSEMBLY
Assemble the SM14 for use as follows:
1. Twist the lower headband arms 90" so they are
perpendicular to the headband. The headband pads
must be located toward the rear of the user's head.
For left side usage, the microphone retaining clip
will be on the left side of the user's head; for right
side usage, the microphone clip will be on the
right (see photo and Figure 1). Swivel the retaining
clips forward (top of clip away from the headband)
until they snap into position.
2. Snap the microphone pivot housing into the retaining clip with the pivot adjustment knob upward
and the microphone toward the front. Loosen the
pivot adjustment knob, position the boom so that
the microphone is near where the side of the
mouth will be, and tighten the pivot adjustment
knob.
3.
Snap the pivot housing of the second receiver assembly into the remaining retaining clip with the
receiver tip downward. Insert the receiver cable
in the groove across the top of the headband. In
this way, the two cables will be adjacent to each
other.
4. Place the assembled microphone on the user's
head and pull the headband arms downward until
they rest against the head just over the ears.
Position the receiver tips at the entrances to the
ears. (Make certain cables are free of receiver ear
tubes.)
ADJUSTMENT
HOUSING
SIDE
OPERATION
SM14
TIPS
POSITIONED
FOR
LEFT
FIGURE 1
4
rn
-3
Copyright
27A1386
(SG)
1979,
Shure
Brothers
Inc.
U.S.
Patent
Printed
4,039,765
in
U.S.A.
WARNING
Sustained high volume levels in conjunction with
a tightly fitting receiver tip may adversely affect
the user's hearing. Make certain the volume is
set to a comfortable listening level and position
the receiver tip at the entrance of the ear.
5. Loosen the pivot adjustment knob and position the
microphone as close as possible to the corner of
the mouth. For optimum close-talking operation,
the microphone should be less than 25 mm (1 in.)
from the corner of the mouth. Be sure to position
the microphone at the corner (not the center) of
the mouth to eliminate explosive breath sounds
("pop"). Tighten the adjustment knob.
6. Snap the microphone connector belt clip over the
groove in the 3-pin male audio connector and the
receiver connector belt clips over the grooves in
the phone plugs. The clips can now be fastened to
the user's belt or other clothing. Attach the 3-pin
audio connector to the microphone cable and the
phone plugs to the monitoring unit cables.
7.
NOTE: A decrease in receiver output may be due
to clogging of the receiver tip. The tip may be
cleaned by removing it from the ear tube and
inserting a toothpick or similar device through the
tip hole. If clogging is apparent in the ear tube,
carefully remove the obstruction from the ear tube
tip.
CAUTION:
Do not disturb the foam damping
material located just inside the ear tube tip.
SPECIFICATIONS
MICROPHONE
Type
Dynamic, Close-Talking
Frequency Response
50 to 15,000 Hz (see Figure 2)
(at 8 mm [5/16 in.])
Impedance
Microphone rating impedance is 150 ohms (200 ohms
actual) for connection to microphone inputs rated
at 19 to 300 ohms
Output Level
Open Circuit Voltage
(close-talked at 1,000 Hz)
. . . . . . . .
-47.0
dB
(4.5
(0 dB = 1 volt per 100 microbars)
Power Level
. . . . . . . . .
. .
. . . .
.
-
66.0 dB
(0 dB = 1 milliwatt per 10 microbars)
Hum Sensitivity
38.4 dB equivalent
(typical)
SPL in a 1 millioersted field
Phasing
Positive pressure on diaphragm produces positive
voltage on pin 2 of microphone connector
Connector
Professional three-pin male audio connector de-
XL
signed to mate with Cannon
(Q.G.)
A3
series or equivalent connectors.
series, Switchcraft
RECEIVERS
Type
Dynamic
Frequency Response
70 to 12,000 Hz
Impedance
2,000 ohms at 1 kHz (200-ohm cartridges with
matching transformers in phone plugs)
Output Level
105 dB SPL with 1.414V at 1 kHz (1.0 mW into 2 cc
cavity)
mV)
TYPICAL
MICROPHONE
FIGURE
FREQUENCY
2
RESPONSE
Polar Pattern
Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis (see Figure 3)
LEOENO
500
-----
POLAR
FIGURE
Hz
,000
HZ
PATTERN
3
Phasing
Positive voltage on phone plug tips produces pos-
itive pressure in ear tubes
Connector
Phone Plugs (contain matching 200:2,000 ohm transformers)
GENERAL
Cable
Non-detachable, 1.5m (5 ft), four-conductor, shielded,
plastic-jacketed; 762 mm (2.5 ft), two-conductor
receiver cable attached to microphone connector.
Non-detachable,
2.9m (9.5 ft), two-conductor cable
attached to second receiver assembly.
Case
Black thermoplastic microphone and pivot housings,
anodized aluminum end caps, stainless steel grille,
ear tubes and boom
Dimensions
See Figure 4
Net Weight
103 grams (3% ounces) less cables and connectors
Packaged Weight
890 grams
(1
Ib, 15 oz)
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