Professional Large Diaphragm Condenser Microphone
Cardioid large-diaphragm condenser microphone delivers exceptional stage and studio performance applications. Features include a preamplifier for transparency, switchable low-frequency filter, and a -15dB switchable attenuator for SPL versatility.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.
In the Box
Shure SM27 Large Diaphragm Cardioid Condenser Microphone
Shure A27SM Elastic Suspension Microphone Shock Mount
Zippered PouchType 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)
−37 dBV/Pa
1 Pascal=94 dB SPL
Maximum SPL
(1 kHz at 1% THD)
1000 Ω load: 133 dB (147 dB, Pad on)
2500 Ω 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 Ω load: 123 dB
2500 Ω load: 128 dB
Common Mode Rejection
(20 Hz to 20 kHz)
> 50 dB
Clipping Level
(20Hz-20 kHz at 1% THD)
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
Self Noise
(typical, equivalent SPL, A-weighted)
9.5 dB
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight 642 g
Switch Attenuator: -15 dB
Low frequency response: flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz
Connector Three-pin professional audio (XLR), male
Power Requirements 48 Vdc phantom, 5.4 mA
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