Shure SM27 Large Diaphragm Cardioid Condenser Microphone Inc

Shure SM27 Large Diaphragm Cardioid Condenser Microphone Inc

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Product Description

The SM27 is a rugged and versatile large-diaphragm, side-address cardioid condenser microphone.  It has 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.

  • 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


Condenser (externally biased)

Frequency Response

20 to 20,000 Hz

Polar Pattern



150 Ohms (140 Ohms actual)

Sensitivity(at 1 kHz, open circuit voltage)

-37 dBV/Pa

1 Pascal=94 dB SPL

Maximum SPL (1 kHz at 1% THD)

1000 Ohm load: 133 dB (147 dB, Pad on)

2500 Ohm load: 138 dB (152 dB, Pad on)

Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz)

84.5 dB

S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted

Dynamic Range (at 1 kHz)

1000 Ohm load: 123 dB

2500 Ohm load: 128 dB

Common Mode Rejection (20 Hz to 20 kHz)

> 50 dB

Clipping Level (20Hz-20 kHz at 1% THD)

1000 Ohm load: 1 dBV

2500 Ohm load: 7 dBV

THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL

Self Noise (typical, equivalent SPL, A-weighted)

9.5 dB


Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3


Net: 642 g (22.6 oz.)


Attenuator: -15 dB

Low Frequency Response: flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz


Three-pin professional audio (XLR), male

Power Requirements

48 Vdc phantom, 5.4 mA

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