Shure KSM27 manual Specifications, Cartridge Type

SPECIFICATIONS

Cartridge Type	Externally Biased Condenser
Frequency Response	20 to 20,000 Hz (see Figure 4)
Directional Polar Pattern	Cardioid (see Figure 5)
Output Impedance	EIA Rated at 150 Ω (140 Ω actual)
Attenuation Switch	0 or 15 dB attenuation
Low Frequency response switch	flat; –6 db/octave below 115 Hz;
	–18 dB/octave below 80 Hz
Phantom Power	48 Vdc ±4 Vdc (IEC–268–15/DIN 45 596), positive
	pins 2 and 3
Current Drain	5.4 mA typical at 48 Vdc
Common Mode Rejection	≥ 50 dB, 20 Hz to 20 kHz
Polarity	Positive pressure on diaphragm produces positive
	voltage on output pin 2 relative to pin 3
Dimensions and Weight	53.0 mm (2.08 in.) maximum body diameter,
	156.2 mm (6.15 in.) long; 642 grams (22.6 oz.)
	(see Figure 6)
Sensitivity (typical, at 1000 Hz;	–37 dBV/Pa
1Pa = 94 dB SPL)
Self–noise (typical, equivalent SPL;	14 dB
A–weighted, IEC 651)
Maximum SPL at 1000 Hz
2500 Ω load (Attenuator on)	137 (152) dB
1000 Ω load (Attenuator on)	132 (147) dB
Output Clipping Level*
2500 Ω load	7 dBV
1000 Ω load	1 dBV
Dynamic Range
2500 Ω load	123 dB
1000 Ω load	118 dB
Signal to Noise ratio**	80 dB

*20 Hz to 20 kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL. **S/N ratio is difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.

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