Shure SM12A User Manual

HEAD-WORN MICROPHONE WITH RECEIVER
GENERAL
The Shure Model SM12A Professional Head-Worn Micro-
phone with Receiver is a low-impedance, unidirectional, dy-
namic microphone with an integral earphone assembly. The
SM12A offers convenient, hands-free operation for sports
and news announcing, interviewing and intercommunica-
tion systems, and for special events remote broadcasting. A
close-talking unit, the SM12A can be used under noisy con-
ditions without loss or masking of voice signals. The SM12A
and the supplied dual-spring steel headband is rugged and
reliable. A miniature windscreen to protect against wind
noise and explosive breath sounds and two connector belt
clips are also supplied.
Features:
S
Close-talk operation and unidirectional polar pattern for
effective noise reduction
S
Smooth natural voice frequency response
S
Locking adjustment knob permits boom to pivot 20° in
any direction
S
Boom length adjustment through 89 mm (3 1/2 in.)
range
S
Built-in receiver protection circuit automatically avoids
excessive sound pressure level
S
Receiver ear tube adjustable through 55° arc
S
Light weight plus dual headband eliminate user fatigue
S
Does not interfere with eyeglasses
S
Ruggedly constructed of stainless steel, aluminum and
high-impact thermoplastic
S
Convenient, secure clips attach connectors to belt or
clothing
2003, Shure Incorporated
27B2325 (CC)
Model SM12A User Guide
RIGHT SIDE OPERATION
As supplied, the microphone is positioned on the left side,
as shown in Figure 1. For right side usage (see photo), re-
move the retaining clip and attach it to the other (unused)
hole in the headband arm so the screw is at the top.
CLEANING THE REVEIVER TIP
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 lo-
cated just inside the ear tube tip.
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 confortable listening level and position the re-
ceiver tip at the entrance of the ear.
ASSEMBLY
Pivot
Adjustment
Knob
Headband
Arm Retaining
Clip
Boom
Microphone
SM12A POSITIONED FOR LEFT SIDE OPERATION
FIGURE 1
1. Position the lower headband arms perpendicular to the
headband.
2. Snap the microphone pivot housing into the retaining
clip with the pivot adjustment knob upward and the mi-
crophone toward the front.
Headband
Pivot Housing
Receiver Tip
Printed in U.S.A.