The Shure KSM109 offers incredible performance, combining an extended frequency response for natural sound reproduction with a smooth high end and a tight, controlled low end. It is all the microphone you need for studio instrument recording.

Some typical applications for the KSM109 are listed below, but the microphone may be used for a variety of applications other than those listed.

• Acoustic instruments -- such as piano, guitar, drums, percussion, strings
• Wind instruments -- brass and woodwind
• Overhead miking -- drums or percussion
• Ensembles -- choral or orchestral
• Room ambiance pick-up -- guitar amplifier or drums

Both the acoustic environment and microphone placement strongly affect the sound obtained from miking a source. You may need to experiment with microphone placement and room treatments to achieve the best overall sound for each application.

Cartridge Type

Permanently Biased Condenser

Frequency Response

20­ to 20,000 Hz

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Directional Polar Pattern

Cardioid

Output Impedance

150 ohms (actual)

Attenuation Switch

0 dB or 15 dB attenuation

Phantom Power

48 Vdc +/- 4 Vdc (IEC­268­15/DIN 45 596), positive pins 2 and 3

Current Drain

5.2 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

24 mm (0.950 in.) diameter, 162 mm (6.375 in.) long;

195 grams (6.9 oz.)

Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL)

-­41 dBV/Pa

Self­noise (typical, equivalent SPL; A-weighted (IEC 651))

19 dB

Maximum SPL@ 1000 Hz

5000 ohms load (Attenuator on)

150 (165 dB)

2500 ohms load (Attenuator on)

144 (159) dB

1000 ohms load (Attenuator on)

139 (154 dB)

Output Clipping Level*

5000 ohms load

15 dBV

2500 ohms load

9 dBV

1000 ohms load

3 dBV

Dynamic Range (Attenuator On)

5000 ohms load

133 (136) dB

2500 ohms load

128 (130 dB)

1000 ohms load

122 (125) dB

Signal to Noise Ratio**

75 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 the difference between 94 dB SPL and equivalent SPL of self-noise A-weighted.