Shure SM27 Specification Sheet
Product Specifications
SM27 Includes Stand Adapter and Zippered Pouch
SM27 Cardioid Condenser Microphone
Overview
The SM27 is a rugged and versatile large-diaphragm, side-address cardioid condenser microphone, with low self-noise and extended frequency
response that 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 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 μm, 24 Karat gold-layered, low mass, Mylar® 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
Available Models
Specifications
Type Condenser (externally biased)
Frequency Response 20 to 20,000 Hz
Polar Pattern Cardioid
Impedance 150 Ω (140 Ω actual)
Sensitivity
(at 1 kHz, open circuit voltage)
Maximum SPL
(1 kHz at 1% THD)
Signal-to-Noise Ratio
(referenced at 94 dB SPL at 1 kHz)
Dynamic Range
(at 1 kHz)
Common Mode Rejection
(20 Hz to 20 kHz)
Clipping Level
(20Hz-20 kHz at 1% THD)
Self Noise
(typical, equivalent SPL, A-weighted)
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net: 642 g (22.6 oz.)
Switch
Connector Three-pin professional audio (XLR), male
Power Requirements 48 Vdc phantom, 5.4 mA
−37 dBV/Pa
1 Pascal=94 dB SPL
1000 Ω load: 133 dB (147 dB, Pad on)
2500 Ω load: 138 dB (152 dB, Pad on)
84.5 dB
S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
1000 Ω load: 123 dB
2500 Ω load: 128 dB
> 50 dB
1000 Ω load: 1 dBV
2500 Ω load: 7 dBV
THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL
9.5 dB
Attenuator: -15 dB
Low Frequency Response: flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz
SM27
Optional Accessories and Replacement Parts
A27SM ShureLock™ Rubber Isolated Shock Mount A322B Zippered Pouch A32WS Windscreen
RPM642 Replacement Rubber Rings for Shock Mount (contains four) PS6 Popper Stopper ™
Polar pattern
120°
90°
60°
www.shure.com ©2015 Shure Incorporated
180°
–20 dB
–15 dB
–10 dB
–5 dB
+5 dB
150°
120°
90°
60°
30°
150°
30°
250 Hz
500 Hz
1000 Hz 10000 Hz
150°
120°
90°
60°
30°
2500 Hz
6400 Hz
180°
–20 dB
–15 dB
–10 dB
–5 dB
+5 dB
150°
30°
120°
60°
90°
Frequency response
+10
0
dB
–10
20 200001000 1000050 100
60 cm
2
2
9876543
876543
9
Hz
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