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Models SM48 and SM48S User Guide
©2006, Shure Incorporated
27C2699 (Rev. 6)
Printed in U.S.A.
MODELS SM48 AND SM48S
UNIDIRECTIONAL DYNAMIC MICROPHONES
Shure Models SM48 and SM48S unidirectional dynamic
microphones are designed for professional sound reinforcement,
studio recording, and broadcasting applications. They maintain a
true cardioid pattern throughout their frequency range, ensuring
high gain before feedback and rejection of off-axis sound. The
tailored frequency response is ideal for vocals. A presence rise
brightens mid-range performance, and a low frequency rolloff
controls proximity effect.
Both models include a shock mounted cartridge, a steel mesh grille,
and an integral “pop” filter. The SM48S also includes a lockable On/
Off switch.
Each microphone is supplied with an adjustable stand adapter and
a zippered carrying/storage bag. Cables are available separately.
FEATURES
• Cardioid pickup pattern rejects off-axis sound and provides
superior gain before feedback
• Frequency response tailored for vocals, with brightened mid-
range and bass rolloff to control proximity effect
• Shock-mounted cartridge for exceptional ruggedness and
reduced handling noise
• Built-in “pop” filter that reduces explosive breath sounds and wind
noise
• Supplied stand adapter and carrying/storage bag
• Lockable On/Off switch (SM48S only)
• Legendary Shure quality and ruggedness
VARIATIONS
SM48
SM48S (with lockable On/Off switch)
SPECIFICATIONS
Type
Dynamic
Frequency Response
55 to 14,000 Hz (see Figure 1)
Polar Pattern
Cardioid (unidirectional) rotationally symmetrical about
microphone axis, uniform with frequency (see Figure 2)
Impedance
Microphone rating impedance is 150 Ω (270 Ω actual) for
connection to microphone inputs rated at 19 to 300 Ω
Output Level (at 1,000 Hz)
Open Circuit Voltage: *.... ..................–57.5 dBV/Pa (1.3 mV)
*1 Pa = 94 dB SPL
Connector
XLR professional audio
Polarity
Positive pressure on diaphragm produces positive voltage on pin
2 with respect to pin 3. See Figure 3.
Dimensions
See Figure 4
Net Weight
370 grams (13.1 oz)
Packaged Weight
672 grams (1 lb, 8.5 oz)
CERTIFICATIONS
Eligible to bear CE Marking. Conforms to European EMC Directive
89/336/EEC. Meets applicable tests and performance criteria in
European Standard EN55103 (1996) parts 1 and 2, for residential
(E1) and light industrial (E2) environments.
FURNISHED ACCESSORIES
Swivel Adapter ...................................................................A25D
Carrying/Storage Bag....................................................... 26A13
OPTIONAL ACCESSORIES
Windscreen .....................................................................A58WS
Desk Stand............................................................. S37A, S39A
Isolation Mount ................................................... A55M, A55HM
Dual Mount........................................................................ A26M
7.6 m Cable (25 ft) .............................................................C25F
REPLACEMENT PARTS
Cartridge ............................................................................ R136
Screen and Grille Assembly..........................................RK248G
Plug Assembly ................................................................ RK40P
On/Off Switch.................................................................. RK81S
LOCKING THE ON/OFF SWITCH (SM48S ONLY)
To lock the On/Off switch in On position, remove the screw from the
lockplate and rotate the lockplate 180°. Then reinstall the screw.
For additional service or parts information, please contact the
Shure Service Department at 1-800-516-2525. Outside the United
States, please contact your authorized Shure Service Center.