Shure KSM141 manual Low Frequency Responses

Setting Low-Frequency Response

A three-position switch on the microphone lets you adjust low frequency response. The low frequency filters can be used to reduce wind noise, room noise, and proximity effect. Refer to Figure 2.

Flat response. This setting provides the most natural sound reproduction in most applicatons.

Low-frequency cutoff. This setting provides an 18 dB-per-octave cutoff at 80 Hz. It helps eliminate floor rumble and low-frequency noise produced by heating and air conditioning systems. This setting may also be used to compensate for proximity effect or to reduce low frequencies that make an instrument sound dull or muddy.

+5

0

dB

–10

		2	3	4	5 6 789
20	50	100Hz			1000

Flat Response

Low-Frequency Cutoff

Low-Frequency Rolloff

Figure 2. Low Frequency Responses

English

Low-frequency rolloff. This setting provides a 6 dB-per-octave rolloff at 115 Hz. Use this setting to compensate for proximity effect or to reduce low frequencies that could make an instrument sound dull or muddy.

Setting Attenuation

The attenuation switch lets you reduce the signal level by up to 25 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 approxi- mately 0.75 meters (2 feet) from sound sources such as a kick drum, snare drum, or electric guitar cabinet.

-25 dB – Move the switch to this position when the microphone is 4 inches (10 cm) or less from extremely loud sound sources such as kick drum, snare drum, or guitar cabinets.

5