Shure WL93 User manual

Models WL93 and SM93 User Guide
Shure Brothers Incorporated
222 Hartrey Avenue
Evanston IL 60202-3696 U.S.A.
E1998, Shure Brothers Incorporated
27A2826 (RB)
222 HARTREY AVENUE, EVANSTON, ILLINOIS 60202–3696 U.S.A. Printed in U.S.A.
MODEL WL93 AND SM93 SUBMINIATURE CONDENSER MICROPHONES
GENERAL
Shure Model WL93 and SM93 Microphones are omnidi-
rectional, subminiature, lavalier electret condenser micro-
phones designed for use in TV broadcasting, theater, and
soundreinforcementapplicationswhereavisuallyunobtru-
sive microphone is desirable. The Model WL93 is for wire-
less use; the SM93 for wired applications. Both featurethe
93 microphone element.
Despite its small size, the 93 microphone element pro-
videsfull,clearsoundcomparabletothatofmuchlargermi-
crophones.Its frequencyresponseistailored tobody-worn
applications, with low-end rolloff and presence rise.
The microphone cable has a miniature 4-pin connector
(Switchcraft TA4F type) that connects directly either to a
Shure wireless body-pack transmitter or to the preamplifier
assembly supplied with the SM93.
Optimum pickup is achieved when the microphone is
worn on the user’s chest. However, high quality sound can
also be obtained when the microphone is worn in the hair,
sewn into clothing, or attached to an acoustic instrument
such as a guitar.
Both models are supplied with a sew-on mounting brack-
et, a mounting block with attached tie bar, and an acoustic
windscreen to minimize wind noise in outdoor applications.
The SM93 is also supplied with a dual mounting block with
attached tie bar.
TheSM93consistsofthe93microphoneandapreampli-
fier assembly with male four–pin “Tini Q–G” (TA4M) and
three-pin professional (XLR-type) audio connectors.
The SM93 is powered by phantom power supplied by
broadcast, sound reinforcement or recording equipment, or
an external phantom supply. The SM93 operates over an
extremely wide voltage range of 11 to 52 Vdc, covering both
DIN and IEC phantom power standards. A dual-channel
power supply (Shure Model PS1A) is available for providing
phantom power to the SM93.
FEATURES
•Subminiaturelavalierdesign;idealsizefortheater,televi-
sion broadcasting, video, film, and sound reinforcement
•Small, inconspicuous mounting hardware
•Full, clear sound comparable to larger microphones
•Smooth extended frequency response with presence
risespeciallytailoredforchest-wornmicrophoneopera-
tion
•Controlled low-frequency rolloff reduces low-frequency
clothing and room noise
•Low distortion, wide dynamic range
•Uniform omnidirectional polar pattern
•Preamplifier assembly (SM93) can be pocketed,
strapped to the body, or clipped to belt or waistband
•Wide-range phantom powering (SM93) accepts all
commonly used voltages
VARIATIONS
Version Cable Color
WL93 1.2 m (4 ft.) Black matte micro-
phone and cable
SM93 phone and cable
with black accesso-
WL93–6 1.6 m (6 ft.)
with
black
accesso-
ries
WL93T 1.2m (4 ft.) Tan matte micro-
phone and cable
WL93–6T 1.8 m (6 ft.) with tan accesso-
ries
www.audiovias.com

2
SPECIFICATIONS WL93 MICROPHONE (with standard test
circuit shown in Figure 1) SM93 MICROPHONE (with preamplifier; refer to Figures 6 and 7)
Type Condenser (electret bias)
Frequency Response (Figure
2) 50 to 20,000 Hz 80 to 20,000 Hz, 12 dB/octave rolloff below 100 Hz
Polar Pattern Omnidirectional, uniform with frequency
Output Impedance 3000 ΩRated at 150 Ω(90 Ωactual)
Recommended minimum load impedance: 800 Ω
(May be used with loads as low as 150 Ωwith re-
duced clipping level)
Output Level
(0 dB = 1 volt per mbar) Open Circuit Voltage –58 dB (1.3 mV). .
Open Circuit Voltage: –63 dB (0.70 mV)
Output Clipping Level
(at 1,000 Hz) 0.25 V at 120 dB –18 dBV (0.13 V) minimum
Total Harmonic Distortion Less than 1% at 120 dB
Maximum SPL 120 dB
Dynamic Range (maximum
SPL to A-weighted noise lev-
el)
102 dB 98 dB
Output Noise (equivalent
SPL) 18 dB typical, A-weighted 22 dB typical, A-weighted 26 dB, weighted per DIN 45 405
Hum Pickup (electromagnet-
ic) N/A –4 dB equivalent SPL in a 1 mOe field (60 Hz)
Signal-to-Noise Ratio 76 dB at 94 dB SPL (IEC 651) 72 dB at 94 dB SPL (IEC 651)
Phasing Positive pressure on microphone dia-
phragmproducespositivevoltageonpins
3 and 4 with respect to pin 1 (ground)*
Positive pressure on microphone diaphragm pro-
duces positive voltage on pin 2 relative to pin 3 of
preamplifier output cable connector
Recommended Operating
Voltage 2 to 10 V; 5 V nominal (pin 2 to pins 3 and 4) 11 to 52 Vdc phantom. Protected against reverse voltage application
Current Drain 40 mA typical 0.33 mA
Environmental Conditions Operating Temperatures:–18oto 60oC (0oto 140oF)
Storage Temperatures:–29oto 66oC (–20oto 150oF)
Cable Black 1.27 m (4.17 ft), attached, two-con-
ductor, shielded terminated by Switch-
craft TA4F type connector (WL93T: Tan
1.27 m [4.17 ft])
Black 1.27 m (4.17 ft), attached, two-conductor,
shielded terminated by Switchcraft TA4F type con-
nector
Case Microphone: Black ABS thermoplastic
case with stainless-steel-mesh grille Microphone: Black ABS thermoplastic case with stainless-steel-mesh grille
Pream
p
lifier: Steel case with non reflective black
Preamplifier: Steel case with non–reflective black
finish, black–chrome belt clip
Net Weight Microphone: 16 g (0.57 oz) Microphone:16 g (0.57 oz)
g
Preamplifier:118 g (4.17 oz)
*Produces positive voltage at pin 2 of Shure L4/EC4 wireless receiver three–pin connector.
1
2
43
+5V
20 K
V out
TEST CIRCUIT
FIGURE 1
TYPICAL FREQUENCY RESPONSE
FIGURE 2
500 1,000 2,000 5,000 10,000 20,00050 100 20020
0
+10
–10
SM93
www.audiovias.com

3
POWERING THE 93 MICROPHONE
The93impedanceconversioncircuitryisdesignedtobe
powered, as shown in Figure 3, from a regulated +5 Vdc
source provided at microphone connector pin 2 from a
Shure wireless body-pack transmitter or from the pream-
plifier supplied with the SM93. If the WL93 is to be used
with any other wireless transmitter, either the microphone
cable or the transmitter input must be rewired for proper
operation and powering within the constraints of the
Rec-
ommended Operating Voltage
and Current Drain specifi-
cations.
NOTE: The WL93 microphone alone is not designed to
be operated directly into the input of a mixer.
MICROPHONE WIRING DIAGRAM
FIGURE 3
1
3
2
CONDENSER
CARTRIDGE IMPEDANCE
CONVERTER
G
SHIELD
BLK
RED
S
D+ 4
POWERING THE SM93 AMPLIFIER
The SM93 with its supplied preamplifier can be powered
by virtually any microphone phantom supply providing 11
to 52 Vdc phantom voltage. The Shure Model PS1A Pow-
er Supply provides power to one or two SM93 micro-
phones. Phantom powering uses the balanced audio
cable pair to carry the supply current to the microphone;
the cable shield is the ground return.
Use only high-quality cables. Intermittent shorts be-
tween broken shield wires and balanced conductors will
cause objectionable noise transients in the system. A reli-
able ground path is essential for the same reason.
LOADING THE SM93 PREAMPLIFIER
A minimum load impedance of 800 Ωor greater should
beusedformaximumsignalhandlingandminimumdistor-
tion. The load can be as low as 150 Ω, but a reduction in
output clipping level will result. It should be noted that the
power supply itself may add loading (3300 Ωin the Shure
PS1A) to the microphone.
MOUNTING THE SM93 PREAMPLIFIER
MostSM93 applicationsrequire thatthe preamplifierbe
worn on the body. The spring-loaded belt clip will hold the
amplifier to a belt, skirt or trouser waistband or inside
pocket.
WINDSCREENS
Since lavalier microphones are typically used indoors,
they normally do not require windscreens. However, an
acoustic foam windscreen( WL93, SM93: black; WL93T:
tan) is supplied to help reduce undesirable wind noise as-
sociated with outdoor miking.
MOUNTING THE MICROPHONE
The tie clips and mounting bracket provided with the
WL93andSM93 arevery smalland designedto minimize
visual detection. They allow the user to wear the micro-
phone in a variety of ways, including the following:
1. Tie Clip. The microphone tie clip features a spring-
loaded clasp that attaches easily to a necktie, lapel,
blouse, or shirt. To mount the 93 to the tie clip, snap the
microphone into the clip’s mounting bracket and attach
the clip to an article of clothing). The SM93 is also sup-
plied with a dual tie clip for simultaneous mounting of
two microphones.
2. Sew-On Bracket. The flat sew-on mounting bracket
provided with the 93 can be sewn directly to a garment
(Figure 4). The use of dark thread (for WL93 or SM93)
or light thread (WL93T) is recommended when sewing
the bracket to clothing.
SEW–ON MOUNTING
FIGURE 4
THREAD
BRACKET
MICROPHONE
GARMENT
NOTE : Other mounting methods can be devised from
materials such as tape, hook-and-loop fasteners, or safe-
ty pins available at most fabric or hardware stores.
3. WL93T. The tan color of the WL93T housing, cable and
accessories, plus its longer-length cable enhance its
use in theater productions where the 93 may be tape-
mounted on the skin or under the hair.
FURNISHED ACCESSORIES
Preamplifier (SM93) 90A4360. . . . . . . . . . . . . . . . . . . . . .
Black Windscreen (WL93, SM93) RK355WS*. . . . . . . . .
Black Tie Clip Assembly (WL93, SM93) RK354SB*. . . .
Dual Black Tie Clip Assembly (SM93) RK307DB. . . . . . .
Tan Windscreen (WL93T) RK304T**. . . . . . . . . . . . . . . . .
Tan Tie Clip Assembly (WL93T) RK304T**. . . . . . . . . . . .
Black Sew-on Mounting Bracket (WL93, SM93) 65B1733. .
Tan Sew-on Mounting Bracket (WL93T) 65B1733A. . . .
Zippered Carrying Bag 26A13. . . . . . . . . . . . . . . . . . . . . . .
∗Replacements furnished in multiples of 4.
** RK304 incluses 2 tie clips and 2 windscreens.
OPTIONAL ACCESSORIES
In-Line On/Off Switch WA360. . . . . . . . . . . . . . . . . . . . . . .
www.audiovias.com

4
OVERALL DIMENSIONS
FIGURE 5
0.23 IN.
(5.84 mm) 0.24 IN.
(6.10 mm)
0.37 IN
(9.4 mm)
0.15 IN.
(3.81 mm)
(1–1/16 IN.)
27 mm
98.8 mm
(3–29/32 IN.)
18.8 mm
(3/4 IN.)
SM93 PREAMPLIFIER
SM93/WL93 MICROPHONE
SM93 PREAMPLIFIER
PRINTED CIRCUIT BOARD
FIGURE 6
SM93 PREAMPLIFIER CIRCUIT DIAGRAM
4.1V 86B429
D1
R2
CC3
1
3
2
P1
L1 2
C4
.6V .1V
.05V
3.5V
D2
86A415
Q1
86A348
R1
R6
C5
33K
Q2
86A350
150 pF
24K
R5
62K
150 pF
C8
18K
R7
C7
1.9V
.1V
B
C6
R4
360K
.047,5%
33X6.3
.047,5%
.05V
BRN
C2
C1
L2 3
1
150 pF
150 pF
YEL
GRNBLK
R3
WHT
1. ALL RESISTORS 5%,1/8 WATT, UNLESS OTHERWISE SPECIFIED.
A
NOTES;
POLARIZED CAPACITORS SHOWN IN µF X VOLTS.
AND 50 VOLTS OR MORE UNLESS OTHERWISE SPECIFIED.
2. ALL NON–POLAR CAPACITORS IN µF, TOLERANCE 10%
T1
D.C. VOLTAGE
A.C. VOLTAGE
A.C. VOLTAGE MEASURED WITH 1 MEG INPUT VOLTMETER. VALUES
3. D.C. VOLTAGES MEASURED WITH 11 MEG INPUT VOLTMETER;
4. THE FOLLOWING SYMBOLS DENOTE:
CASE GROUND
CIRCUIT BOARD GROUND
SHOWN ARE TYPICAL AND MAY VARY +20%.
1
3
2
RED
BLK
GRN
4
P2
5. NO COMPONENTS USED AT LOCATIONS R1, R3, C4.
90B8274A–1
FIGURE 7
The Sound of Professionals...WorldwideR
Shure Brothers Incorporated
222 Hartrey Avenue, Evanston IL 60202-3696
www.audiovias.com