Specifications - Shure KSM137 User Manual

Specifications

Cartridge Type
Electret Condenser
Polar Pattern
Cardioid
Frequency Response
20 to 20,000 Hz
Output Impedance
150 Ω
Sensitivity
open circuit voltage, @ 1 kHz, typical
–37 dBV/Pa[1] (14.1 mV)
Maximum SPL
1 kHz at 1% THD[2]
PAD ON 5000 Ω load
2500 Ω load
1000 Ω load
PAD OFF 5000 Ω load
2500 Ω load
1000 Ω load
Signal-to-Noise Ratio[3]
80 dB
Dynamic Range
@ 1 kHz
5000 Ω load
2500 Ω load
1000 Ω load
Clipping Level
20 Hz to 20 kHz, 1% THD
5000 Ω load
2500 Ω load
1000 Ω load
Self Noise
equivalent SPL, A-weighted, typical
14 dB SPL-A
Common Mode Rejection
10 to 100,000 kHz
≥50 dB
Attenuator Switch
0, -15, -25 dB
170 dB
164 dB
159 dB
145 dB
139 dB
134 dB
131 dB
125 dB
120 dB
15 dBV
9 dBV
3 dBV
Low-Frequency Filter Switch
Flat, –6 dB/octave below 115 Hz, or –18 dB/octave
below 80 Hz
Connector
Three-pin professional audio (XLR), male, balanced
Polarity
Positive pressure on diaphragm produces positive
voltage on pin 2 with respect to pin 3
Power Requirements
11–52 V DC[4] phantom power (IEC-61938) 4.7 mA,
maximum
Net Weight
100 g (3.5 oz.)
[1] 1 Pa=94 dB SPL
[2]THD of microphone preamplifier when applied input
signal level is equivalent to cartridge output at speci-
fied SPL
[3]S/N ratio is the difference between 94 dB SPL and
equivalent SPL of self noise, A-weighted
[4]All specifications measured with a 48 Vdc phantom
power supply. The microphone operates at lower
voltages, but with slightly decreased headroom and
sensitivity.
15 cm
60 cm
Typical Frequency Response
250 Hz
500 Hz
1000 Hz
Typical Polar Patterns
20 mm
Overall Dimensions
7
2500 Hz
6400 Hz
10000 Hz
122 mm