Shure SM27 User Manual page 3

SM27 User Guide
Cardioid Condenser Microphone
The Shure® SM27 is a rugged and versatile large-diaphragm, side-address
cardioid microphone. Low self-noise and extended frequency response picks
up vocal and instrument nuances with clarity. Durable Shure construction
features three separate mesh layers that reduce wind and breath noise.
Equally comfortable on the stage or in the studio.
Features
• Cardioid polar pattern-the most commonly used pattern for both studio
and live applications
• 1 inch, externally biased, ultra-thin, 2.5
~m .
24 Karat gold-layered, low
mass, Mylare diaphragm provides superior transient response
• Class A, discrete, transformerless preamplifier for transparency, extremely
fast transient response and no crossover distortion, while minimizing
harmonic and intermodulation distortions
• Premium electronic components and gold-plated internal and external
connectors
• Subsonic filter eliminates rumble from mechanical vibration below 17 Hz
• Switchable 15 dB pad for handling extremely high sound pressure levels
(SPLs)
• 3-position switchable low-frequency filter helps reduce unwanted
background noise or counteract proximity effect
• Integrated three-stage "pop" protection grille reduces plosives and other
breath noise
• Internal shock mount reduces handling and stand noise
Variations
SM27-LC:
Includes a padded carrying bag and low-profile stand mount.
SM27-SC: Includes a rubber-suspension shock mount and velveteen pouch.
Performance Characteristics
• Extremely uniform polar response
• Extended frequency response
• Minimal self-noise
• Exceptional low-frequency reproduction
• Able to withstand high SPLs
• High output level
• No crossover distortion
• Superior common-mode rejection and suppression of radio frequency
interference (RFI)
Applications
• Brass and woodwind instruments
• Orchestras, choirs, and wind ensembles
• Overhead miking of drums and percussion instruments
• Close-miking of acoustic instruments such as piano, guitar, violins,
drums, and percussion
• Low-frequency instruments such as double bass and kick drum
• Electric guitar and bass amplifiers
• Vocals and speech
• Room ambience
Note: Sound quality is strongly affected by microphone location and
room acoustics. To achieve the best overall sound for a particular
application, it may be necessary to experiment with microphone
placement and room treatments.
Mounting the Microphone
Use the supplied microphone mount with floor or boom stands. Visit
www.
shure.com for more mounting options:
• To reduce the pickup of unwanted low-frequency mechanical vibrations,
use an isolating shock mount.
• For stereo applications, use the optional Shure A27M Stereo
Microphone Adapter.
Positioning the Microphone
The front of the microphone is marked by the
SIIV¥
logo. Position this
side toward the sound source.
Selecting Low-Frequency Response
A three-position switch on the back of the microphone lets you adjust the
low-frequency response. Use the low-frequency filter to reduce wind noise,
room noise, or proximity effect.
-Flat
response. Provides the most natural sound in most applications.
rLow frequency cutoff. Provides an 18 dB-per-octave cutoff at 80
Hz. Helps eliminate floor rumble and low-frequency room noise from
heating and air conditioning systems. This setting may also be used to
compensate for proximity effect or to reduce low frequencies that make an
instrument sound dull or muddy.
-Low frequency rolloff. Provides a 6 dB-per-octave rolloff filter at
115 Hz. Use this to compensate for proximity effect or to reduce low
frequencies that could make an instrument sound dull or muddy.
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