Shure SM27 Cardioid Studio Condenser Mic

• 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

Type
Condenser (externally biased)

Frequency Response
20 to 20,000 Hz

Polar Pattern
Cardioid

Impedance
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

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

Weight
Net: 642 g (22.6 oz.)

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