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5
Low-frequency rolloff. Provides a 6dB-per-octave rolloff filter at 115Hz.
Use this setting with vocals or instruments to compensate for proximity effect or to
reduce low frequencies that could make an instrument sound dull or muddy.
Setting Attenuation
The attenuation switch on the back of the KSM27 reduces the signal level from
the cartridge by 15 dB without altering the frequency response. This can prevent
extremely high SPLs (ie. close miked drums and guitar cabinets) from overloading
the microphone. To activate attenuation, move the switch to the “-15 dB” position.
0 dB – Use this switch for “quiet” to “normal” sound levels.
-15 dB – This switch position should be used when in close proximity with
extremely loud sound sources such as kick drum, snare drum, or loud guitar
cabinets.
Integral Pop Filter
The KSM27 grille consists of 3 separate mesh layers that act as an integral pop
filter which helps reduce wind and breath noise. Depending on the performer, an
external pop-protection screen or windscreen may be necessary when
close-miking vocalists. (See Figure 3) The low-frequency cutoff filter may also be
effective.
FIGURE 3. PS–6 Popper Stopper
t
Pop Filter
(shown here with the KSM44)
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 KSM27 provides
higher maximum SPL capability and out put clipping level. WIth the –15 dB pad
engaged, the KSM27 can handle up to 153 dB SPL and 15 dBV into a 2500
Ω
or greater load.
