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Setting Attenuation
The attenuation switch on the back of the KSM44 reduces the signal level from
the cartridge by 15 dB without altering the frequency response. This can prevent
extremely high SPLs from overloading the microphone. To activate attenuation,
move the switch to the “-15 dB” position. Note: In situations where the high out-
put of the KSM44 might overload the microphone preamplifier of a console or
mixer, use an attenuation pad in the mixer.
Load Impedance
A load impedance of at least 1000 Ω is recommended. When used with typical
modern microphone preamplifiers (rated at about 2500 Ω), the KSM44 provides
higher maximum SPL capability and output clipping level. With the -15 dB pad
engaged, the KSM44 can handle up to 156 dB SPL and output +15 dBV into a
5500 ohm or greater load.
Integral Pop Filter
The KSM44 has an integral pop filter which helps reduce wind and breath noise.
An external pop-protection screen or windscreen may be necessary when
close-miking vocalists. The low-frequency cutoff filter may also be effective. See
Figure 3.
FIGURE 3.PS-6 POPPER STOPPER™
POP FILTER