Audio Technica ES991 Installation And Operation

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ngineered
The ES991 is a dual-element cardioid
condenser gooseneck microphone with an
integral dual power module. It is designed
especially for applications requiring separate
miking for PA and broadcast. The circuit grounds
for each channel are completely isolated, greatly
reducing the potential for hum. The small-
diameter design with gooseneck segment
permits flexible positioning while maintaining
a smooth, contoured appearance.
Each of the cardioid elements in the
microphone is shock mounted. The cardioid
polar pattern of the elements provides a 120°
angle of acceptance. Additional
interchangeable hypercardioid
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Installation and Operation
The ES991 requires a phantom power supply
of 11–52V DC for each element. Output is
low-impedance balanced. The balanced signal
appears across Pins 2 and 3, while the ground
(shield) connection is Pin 1. Output is phased so
that positive acoustic pressure produces positive
voltage at Pin 2, in accordance with industry
convention.
The microphone is intended for use with a
desk or floor stand and comes with the AT8407
stand adapter. Use the adapter to attach the
microphone to a microphone stand with a
thread. Attach the included 6-pin Neutrik
XLRF-type shielded cable directly to the 6-pin
XLRM-type output connector. The 30' cable
splits the signal into two 3-pin XLRM-type
connectors, which can be connected to in-house
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Architects and Engineers Specifications

The microphone shall be a dual-element,
fixed-charge condenser with a frequency
response of 90 Hz to 15,000 Hz and a
cardioid polar pattern with uniform 120° angle
of acceptance. It shall contain two shock-
mounted cardioid elements with isolated
grounds. It shall operate from an external 11V
to 52V DC phantom power source. It shall be
capable of handling sound input levels up to 138
dB with a dynamic range of 109 dB. It shall have
a fixed low-frequency roll-off of 120 Hz, 12
dB/octave. It shall include a 15 dB pad switch.
Output shall be low-impedance balanced (250
ohms).
The microphone shall be a small-diameter
rigid-pipe design with a flexible gooseneck
segment. The microphone
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Description
omnidirectional (360°) elements are available.
The ES991 is designed with dual integral
windscreens to ensure ultimate security against
wind noise and plosives.
The integral power module can be powered
from any external 11V to 52V DC phantom
power supply. Low-frequency roll-off (120 Hz, 12
dB/octave) is integral to the microphone's design.
The microphone is enclosed in a sturdy metal
housing with a low-reflectance black finish. It
features a 6-pin XLRM-type connector insert at
its base, allowing it to be plugged directly into a
6-pin XLRF-type panel jack or microphone cable
user-
(a 30' "Y" cable that splits into two 3-pin XLRM-
(100°) and
type connectors is included).
and/or remote feeds. Connect the red output
(Channel A) to the primary in-house feed.
Connect the blue output (Channel B) to the
remote feed.
The high output of this microphone can
overload the input stages of some mixers and
preamps. Included in the microphone circuitry is
a 15 dB pad that can be used if overload occurs.
This switch is recessed in the power module.
While a modern condenser microphone
is not unduly sensitive to the environment,
5 / "–27
8 temperature extremes can be harmful. Avoid
leaving the microphone in the open sun or in
areas where temperatures exceed 110° F (43° C)
for long periods of time. Extremely high
humidity should also be avoided.
self-contained power module with a 6-pin
XLRM-type connector at the base for direct
connection to a 6-pin XLRF-type panel jack or
for use with the included 30' splitter cable. The
cable shall connect to the microphone by a 6-pin
XLRF-type connector and shall terminate in two
3-pin XLRM-type connectors. An included stand
clamp shall permit attaching the microphone
directly to a standard
The microphone's overall length shall be
21.57" (548.0 mm). Head diameter shall be 1.51"
(38.4 mm). Base diameter shall be 0.99" (25.1
mm).The microphone shall weigh 8.8 oz (250 g).
Finish shall be low-reflectance black.
The Audio-Technica ES991 is specified.
shall have a
ound
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5 / "–27 thread.
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ES991
Dual-element
Cardioid Condenser
Gooseneck Microphone
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