SM27 Multi-Purpose Condenser Microphone

The SM27 is a rugged and versatile large-diaphragm, side-address cardioid 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.

Large diaphragm, side-address cardioid condenser microphone for stage and studio applications.

• Uniform cardioid pattern for superior off axis rejection
• Superior transient response from a low-mass large Mylar® diaphragm
• Flat, neutral frequency response for natural reproduction on stage or in the studio
• 3-position switchable low-frequency filter helps reduce unwanted background noise or counteract proximity effect for consistent, extended low-end
• Durable metal construction.
• Three separate mesh layers reduces wind and breath noise.
• 15dB pad for performance consistency across a wider range of high SPL sources

SM27 Spec Sheet (PDF, English)

Cartridge Type
Externally Biased Condenser

Frequency Response
20 to 20,000 Hz

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Directional Polar Pattern
Cardioid

Output Impedance
EIA Rated at 150 ohms (140 ohms actual)

Attenuation Switch
0 or 15 dB attenuation

Low Frequency response switch
Flat
-6 db/octave below 115 Hz
-18 dB/octave below 80 Hz

Phantom Power
48 Vdc +/- 4 Vdc (IEC­268­15/DIN 45 596), positive pins 2 and 3

Current Drain
5.4 mA typical at 48 Vdc

Common Mode Rejection
>50 dB, 20 Hz to 20 kHz

Polarity
Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3

Dimensions and Weight
53.0 mm (2.08 in.) maximum body diameter
156.2 mm (6.15 in.) long;
642 grams (22.6 oz.)

Sensitivity (typical, at 1000 Hz; 1Pa = 94 dB SPL)
-37 dBV/Pa

Self­noise (typical, equivalent SPL; A­weighted, IEC 651)
9.5 dB

Maximum SPL (1000 Hz at 1% THD)
2500 ohm load (Attenuator on): 138 (153) dB
1000 ohm load (Attenuator off): 133 (148) dB

Output Clipping Level*
2500 ohm load: 7 dBV
1000 ohm load: 1 dBV

Dynamic Range
2500 ohm load: 128 dB
1000 ohm load: 123 dB

Signal to Noise ratio**
84.5 dB

*20 Hz to 20 kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL.
**S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.

• SM27 KSM27 Comparison Chart