Shure SM10A User manual

Model SM10A User Guide
Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
27A2323 (RH)
E1998, Shure Brothers Inc. Printed in U.S.A.
MODEL SM10A
UNIDIRECTIONAL HEAD-WORN MICROPHONE
TheShureModelSM10AProfessionalheadwornMicro-
phone is a low-impedance, unidirectional, dynamic
microphone. Designed for sports and news announcing, in-
terviewing and intercommunication systems, and for
special-eventsremotebroadcasting,the SM10A offerscon-
venient, hands-free operation without user fatigue. Drum-
mers, keyboard artists and other musicians who need a
vocal microphone — one that will not pick up unwanted
sounds — will find the SM10A’s smooth, natural voice
frequency response and noise cancellation ideal for their
applications. A close-talking unit, the SM10A may be used
under noisy conditions without loss or masking of voice
signals. The SM10A is a small, lightweight, rugged and reli-
able unit, with provisions for mounting to a supplied dual
spring-steel headband. A pivot housing permits the micro-
phone boom to be moved 20_in any direction, and the dis-
tance between the microphone and pivot to be changed by
up to 89 mm (3 1/2in.). A miniature windscreen to protect
againstwindnoise and explosive breathsounds,anda con-
nectorbeltcliparealsosupplied.Anadapterplateforboom-
mountingonstereoheadphonesisavailablewithoutcharge.
Features
• Close-talkoperationandunidirectionalpolarpattern for
effective noise reduction
• Smooth natural voice frequency response
• Locking adjustment knob permits boom to pivot 20 _ in
any direction
• Boomlengthadjustmentthrough89mm(3
1
/
2
in.)range
• Light weight plus dual 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
• Capability for boom-mounting to stereo headphones
ASSEMBLY
Assemble the SM10A for use as follows:
1. Twist thelowerheadbandarms 90_so theyareperpen-
dicular to the headband. As supplied, the retaining clip
is positioned for left side operation as shown in Figure
1.Forrightsideusage(seephoto),removetheretaining
clip and attach it to the other (unused) hole in the head-
band arm so the screw is at the top.
2. Snap the microphone pivot housing into the retaining
clip with the pivot adjustment knob upward and the mi-
crophone toward the front. Loosen the pivot adjustment
knob, position the boom so that the microphone is near
wherethesideofthemouth willbe,andtightenthepivot
adjustment knob.
3. 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.
4. Loosen the pivot adjustment knob and position the mi-
crophone as close as possible to the corner of the
mouth. For optimum close-talking operation, the micro-
phoneshouldbelessthan25 mm (1 in.) fromthecorner
of the mouth. Be sure to position the microphone at the
corner (not the center) of the mouth to eliminate explo-
sive breath sounds (“pop”). Tighten the adjustment
knob.
5. Snaptheconnector belt clip overthegroovein the 3-pin
audio connector. The clip can now be fastened to the
user’s belt or other clothing. Attach the 3-pin audio con-
nector to the microphone cable.
SM10A POSITIONED FOR LEFT SIDE
OPERATION
FIGURE 1
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Product Information

SPECIFICATIONS
Type
Dynamic, Close-Talking
Frequency Response (at 8 mm [5/16] in.)
50 to 15,000 Hz (see Figure 2)
TYPICAL FREQUENCY RESPONSE
FIGURE 2
Polar Pattern
Cardioid (unidirectional) response — uniform with fre-
quency, symmetrical about axis (see Figure 3)
TYPICAL POLAR PATTERN
FIGURE 3
lmpedance
Microphone rating impedance is 150 ohms (223 ohms
actual) for connection to microphone inputs rated at
19 to 300 ohms
Output Level (close-talk at 1,000 Hz)
Open Circuit Voltage –45.0 dB (4.5 mV). . . . . . . . . . . .
0 dB = 1 volt per 100 microbars
Power Level – 66.0 dB. . . . . . . . . . . . . . . . . . . . . . . . . . .
0 dB = 1 milliWatt per 10 microbars
Hum Sensitivity (typical)
35.5 dB equivalent SPL in a 1 millioersted field
Polarity
Positive pressure on diaphragm produces positive
voltage on pin 2 of microphone connector
Connector
Professional three-pin audio connector designed to
mate with Cannon XL series, Switchcraft A3 (Q.G.
series or equivalent connectors).
Cable
Non-detachable, 1.5 m (5 ft), two-conductor, shielded,
plastic-jacketed
Case
Black thermoplastic microphone and pivot housing,
anodized aluminum end caps, stainless steel grille,
and boom
Dimensions
See Figure 4
OVERALL DIMENSIONS
FIGURE 4
Net Weight
78 grams (2.7 ounces) less cable and connector
Packaged Weight
950 grams (2 lbs., 1 1/2oz)
CARTRIDGE CONNECTOR
RED
CODED SIDE
RED
BLK
12
3
INTERNAL CONNECTIONS
FIGURE 5
Certification
Conforms to European Union directives, eligible to
bear CE marking; meets European Union EMC Immu-
nity Requirements (EN 50 082–1, 1992).
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ON-OFF SWITCH
An on-off switch to control the microphone is easily
constructed as shown in Figure 6. (A commercial alternate
can be purchased: Switchcraft T3F, a 3-pin female profes-
sional audio connector with the switch incorporated. This
connector can be attached to the extension cable used to
connect the SM10A to the PA system.)
12
31
23
J1
INPUT J2
OUTPUT
S1
ON-OFF SWITCH
FIGURE 6
The parts shown in Figure 6 are:
Reference Part
J1 3-Pin female audio connector, chassis mount
J2 3-Pin male audio connector, chassis mount
S1 Miniature toggle switch, SPST
Metal box
Connecting leads
STEREO HEADPHONE USE
The SM10A microphone can be used as a boom micro-
phone with stereophonic headphones having provisions for
mountingboom microphones.These headphones areiden-
tifiedbyaremovable knurledknoborscrewontheleft head-
phone cup.
Akitcontainingaheadphoneadapterplate,capnut,and
lockwasher is available without charge as Part No.
90DH2600 from Shure Brothers Service Department, 222
Hartrey Avenue, Evanston, IL 60202–3696 U.S.A.
STEREO HEADPHONE BOOM MOUNTING
FIGURE 7
To mount the SM10A on a stereo headphone, remove
the retaining clip from the SM10A headband arm by remov-
ing the retaining clip screw. Mount the retaining clip on the
headphone adapter plate using the retaining clip screw and
supplied lockwasher and cap nut. Unscrew the removable
knob or screw from the stereo headphone cup. Position the
headphone adapter plate with the retaining clip downward,
and replace the knob or screw on the headphone cup (see
Figure 7). Snap the SM10A pivot housing into the retaining
clip, pivot adjustment knob upward, and place the
headphone-microphone assembly on the user’s head. Ad-
justthemicrophonepositionasdescribedinstep4oftheAs-
sembly procedure.
ARCHITECTS’ SPECIFICATIONS
The microphone shall be the Shure Model SM10A or
equivalent. The microphone shall be a moving-coil (dynam-
ic) type with a frequency response of 50 to 15,000 Hz. The
unit shall have a cardioid polar characteristic. The cancella-
tion at the rear shall be 15 to 20 dB. The microphone shall
be low impedance with a rated impedance of 150 ohms for
connection to microphone inputs rated at 19 to 300 ohms.
Themicrophoneoutputshallbe–66.0dBwhere0dB=1mil-
liWatt per 10 microbars.The microphone shall be a head-
worn type, and shall be provided with a 1.5 m (5 ft), non-de-
tachable,two-conductor,shieldedcablewithaprofessional,
three-pin, audio connector designed to mate with Cannon
XL series, Switchcraft A3 (Q.G.) series or equivalent
connectors. The microphone shall also be provided with a
headband, connector belt clip, and foam windscreen.The
overalldimensionsofthemicrophoneshallbe203mm(8in.)
in length and 44.5 mm (1-3/4in.) in maximum height (pivot
housing).Themicrophonehousingshallbe15.9mm(5/8in.)
in diameter and 14 mm (9/16 in). in height.
ACCESSORIES AND REPLACEMENT PARTS
The following furnished accessories and replacement
parts may be ordered through your Authorized Shure Pro-
fessional Products Dealer or from Shure Brothers Inc.
Connector Belt Clip RK200BC. . . . . . . . . . . . . . . . . . . . . . .
Windscreen RK184WS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Microphone Cartridge R93. . . . . . . . . . . . . . . . . . . . . . . . .
Headband Assembly 90A3997. . . . . . . . . . . . . . . . . . . . . .
Retaining Clip 53A1801A. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headphone Adapter Plate 90DH2600. . . . . . . . . . . . . . . .
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