Shure KSM109 User Manual download pdf (Page 5)

USING THE KSM109

Mounting the Microphone

To secure the KSM109 to a floor stand or boom, thread the mount onto the

microphone stand and insert the microphone into the mount.

Power Requirements

The KSM109 requires phantom power and performs best with a 48 Vdc supply

(IEC-268-15/DIN 45 596). It can operate on voltages as low as 11 Vdc, but

headroom and sensitivity will be decreased slightly.

Note: Most modern mixers provide phantom power.

Cable Connections

Use a cable with XLR connectors at each end.

Load Impedance

Shure recommends a load impedance of at least 1000 Ω. When used with

modern microphone preamplifiers rated at about 2500 Ω, the KSM109

provides higher maximum SPL capability and output clipping level. When the

attenuation switch is set to the -15 dB position, the KSM109 can handle up to

165 dB SPL, and can output +15 dBV into a load of 5000 Ω or greater.

Setting Attenuation

The attenuation switch on the KSM109 lets you reduce the signal level by up

to 15 dB without altering frequency response. This can prevent extremely loud

sounds from overloading the microphone. Set the switch to the desired

attenuation levels as follows:

0 dB - Move the switch to this position for “quiet” to “normal” sound levels.

-15 dB - Move the switch to this position when the microphone is

approximately 0.75 meters (2 feet) from sound sources such as a snare drum,

or electric guitar cabinet.

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Shure KSM109 User Manual Page 5