Shure KSM44 manual Selecting Low-Frequency Response

Selecting Low-Frequency Response

A three-position switch on the back of the KSM44 allows you to adjust the low-frequency response of the microphone, as shown in Figure 2. The low-frequency filter settings can be used to reduce wind noise, room noise or proximity effect.

Flat response. Use this setting when you desire the most natural reproduction of the source. Since the microphone will reproduce ultra-low frequencies, the ShureLockt elastic-suspension shock mount may be required to reduce low-frequency mechanical vibrations transmitted through the microphone

stand.		+5
Low-frequency	cutoff.	0
		dB
Provides an 18 dB-per-octave cutoff at
		–10
80 Hz. Helps eliminate stage rumble or
low-frequency room noise from
heating, ventilation, or cooling (HVAC)
				2 3		4 5 6 789
systems. It may also be	used to	20	50	100		1000
					Hz
compensate for proximity effect or to
				Flat Response
reduce low frequencies that make an				Low-Frequency Cutoff
				Low-Frequency Rolloff

instrument sound dull or muddy. Figure 2. Low Frequency Responses

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 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 output of the KSM44 might overload the microphone preamplifier of a console or mixer, use an attenuation pad in the mixer.

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.

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

Ωor greater load.

English

5