Proximity Effect; Power Requirements - Shure KSM9HS Guia Del Usuario

Operation

Proximity Effect

Directional microphones progressively boost bass frequencies as the microphone is placed closer
to the source. This phenomenon, known as proximity effect, can be used to create a warmer, more
powerful sound. However, it usually requires the vocalist to maintain a consistent distance from the
microphone in order to avoid changing the low-frequency response.
The dual-diaphragm design of the KSM9HS helps to control and minimize proximity effect, resulting in
a more uniform low-frequency response. This allows the performer to move closer or further from the
microphone with minimal changes in sound quality.
Selecting a Polar Pattern
Hypercardioid: Use the hypercardioid setting to avoid feedback and
achieve maximum isolation in loud environments. This pickup pattern
is highly directional, with the greatest sensitivity occurring at the front
of the microphone and maximum off-axis rejection occurring at 110
degrees toward each side.
Subcardioid: Use the subcardioid setting to capture more room
characteristics and extract detail in quiet environments. This pickup
pattern is directional, but much wider than the hypercardioid setting.
The greatest sensitivity occurs at the front of the microphone, while
maximum rejection occurs at 180 degrees toward the rear of the
microphone.

Power Requirements

This microphone requires phantom power and performs best with a 48 V DC supply (IEC-61938),
but it can operate with supplies as low as 11 V DC. Most modern mixers provide phantom power and
require the use of a balanced microphone cable: XLR-to-XLR or XLR-to-TRS.
Load Impedance
Maximum SPL capability, output clipping level, and dynamic range vary with the input load imped-
ance of the preamplifier to which the microphone is connected. Shure recommends a minimum input
load impedance of 1000 Ohms. Most modern microphone preamplifiers meet this requirement. Higher
impedance results in better performance for these specifications.
Integral Pop Filter
The microphone grille consists of 3 separate mesh layers that act as an integral pop filter. This helps
reduce wind and breath noise. Depending on the performer, an external pop-protection screen or
windscreen may be necessary when close-miking vocalists.
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