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Model SM94 User Guide
©2005, Shure Incorporated
27C2689 (Rev. 5)
Printed in U.S.A.
MODEL SM94
UNIDIRECTIONAL CONDENSER MICROPHONE
The Model SM94 is a unidirectional electret condenser
microphone tailored to the instrument miking needs of professional
musicians and sound engineers in both live performance and
sound recording. Its smooth, flat frequency response is free of
either a “presence peak” or a low-frequency rolloff, making it a
perfect choice for all types of musical instruments. The SM94 is
equally at home in sound reinforcement systems or in sound
studios and motion picture/TV scoring stages. When used with the
optional windscreen, the SM94 can be used by vocalists and
speechmakers who desire a wide, flat response with minimum
coloration.
The SM94 can be powered by any phantom power source, or by
an internal 1.5-volt AA battery. The battery, which serves as a
backup power source in the event of phantom power failure, can
provide up to 5,000 hours of continuous operation.
The SM94 is supplied with a swivel adapter for use on a
microphone stand, boom or gooseneck, and a zippered vinyl
storage bag. Model SM94-LC is supplied without a cable.
Accessories include a foam windscreen (A3WS), two-channel
phantom power supply (PS1A), and 7.6 m (25 ft.) microphone
cable (C25J).
Features
• Wide, flat response for optimum musical instrument sound re-
production
• Full spectrum sound–no presence peak or low-end rolloff
• Cardioid polar pattern that is uniform with frequency and sym-
metrical about axis for maximum rejection of unwanted sound
and minimum of-axis coloration
• Very low susceptibility to RF and electromagnetic hum
• Low distortion output and wide dynamic range for variety of load
impedances
• Shock–mounted cartridge for reduced handling noise
• Accepts 12 to 48 Vdc phantom power
• Rugged all–metal construction
• Usable over wide range of environmental conditions
• Built–in battery power backup
• Optional foam windscreen
SPECIFICATIONS
Type
Cardioid condenser (electret bias)
Frequency Response
40 to 16,000 Hz (see Figure 1)
TYPICAL FREQUENCY RESPONSE
FIGURE 1
Polar Pattern
Cardioid (unidirectional)–uniform with frequency,
symmetrical about axis (see Figure 2)
TYPICAL POLAR PATTERNS
FIGURE 2