MODELS SM48 AND SM48S
UNIDIRECTIONAL DYNAMIC MICROPHONES
Shure Models SM48 and SM48S unidirectional dynamic mi-
crophones are designed for professional sound reinforce-
ment, 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 in-
cludes 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
Conforms to European Union directives, eligible to bear
CE marking; meets European Union EMC Immunity Re-
quirements (EN 50 082–1, 1992).
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 rein-
stall 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.
Models SM48 and SM48S User Guide
27A2699 (TD)
2000, Shure Incorporated
Printed in U.S.A.
