Shure KSM44A - Manual (Page 7)

8
SPECIFICATIONS
Cartridge Type Dual-Diaphragm, Externally-Biased Condenser
Polar Pattern Cardioid, Omnidirectional, Bidirectional
Frequency Response 20 to 20,000 Hz
Output Impedance 50 Ω
Attenuator Switch 15 dB
Low-Frequency Filter Switch Flat, –6 dB/octave below 115 Hz, or –18 dB/octave below 80 Hz
Power Requirements 11–52 V DC phantom power (IEC 61938)
5.8 mA, maximum
Common Mode Rejection (10 to 100,000 Hz) >50 dB
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with
respect to pin 3
Net Weight 492 g (17.4 oz.)
Connector Three-pin professional audio (XLR), male, balanced
Cardioid Omnidirectional Bidirectional
Sensitivity (open circuit
voltage, @ 1 kHz, typical)
–31 dBV/Pa † (29.8 mV) –37 dBV/Pa † (14.8 mV) –36 dBV/Pa † (16.8 mV)
Self Noise (equivalent SPL,
A-weighted, typical)
4 dB SPL-A 6 dB SPL-A 7.5 dB SPL-A
Preamplifier Distortion (at 1
kHz, 94 dB SPL)
<0.001%*
Signal-to-Noise Ratio** 90 dB 88 dB 86.5 dB
Clipping
Level (20 Hz
to 20 kHz, 1%
THD)
2500 Ω
load
9 dBV
1000 Ω
load
6 dBV
Dynamic Range
(@ 1 kHz)
2500 Ω
load
130 dB 134 dB 131 dB
1000 Ω
load
127 dB 131 dB 128 dB
Maximum SPL (1 kHz at
1% THD)*
PAD OFF PAD ON PAD OFF PAD ON PAD OFF PAD ON
2500 Ω
load
134 dB SPL 150 dB SPL 140 dB SPL 152 dB SPL 139 dB SPL 151 dB SPL
1000 Ω
load
131 dB SPL 147 dB SPL 137 dB SPL 149 dB SPL 136 dB SPL 148 dB SPL
*THD of microphone preamplifier when applied input signal level is equivalent to cartridge output at specified SPL
**S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
† 1 Pa=94 dB SPL