Audio Technica ES945 Specifications

ES945 & ES945W
Omnidirectional Condenser Boundary Microphones
Features
• Mounts unobtrusively in table-tops, ceilings and wall panels
• Low-profile element provides uniform omnidirectional polar
pattern with 360º acceptance angle
• UniGuard RFI-shielding technology offers outstanding rejection
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of radio frequency interference (RFI)
• Self-contained electronics eliminate the need for external power
module
• Rugged all-metal case with a two-layer steel mesh grille
• Isolators provide mechanical dampening of mounting-surface
vibration
• Available in two colors: black (ES945) and white (ES945W)
Description
The ES945 is a wide-range condenser microphone with an
omnidirectional polar pattern. It is designed for unobtrusive table, ceiling
or panel-mounted use in high-quality sound reinforcement, conferencing,
professional recording, television and other demanding sound pickup
applications.
The microphone requires 11V to 52V phantom power for operation.
The microphone is equipped with UniGuard
which offers outstanding rejection of radio frequency interference (RFI).
The output of the microphone is a 3-pin XLRM-type connector.
Isolators are included with the microphone for optional mechanical
isolation from the mounting surface. The microphone is enclosed in
a heavy-duty die-cast case and protected by a two-layer steel mesh
grille. The low-profile housing has a low-reflectance black finish. The
microphone is also available in white as the ES945W.
Installation and Operation
The ES945 requires 11V to 52V phantom power for operation.
Output is low impedance (Lo-Z) balanced. The signal appears across Pins
2 and 3; Pin 1 is ground (shield). Output phase is "Pin 2 hot"— positive
acoustic pressure produces positive voltage at Pin 2.
The microphone should be installed on a flat, unobstructed mounting
surface. The small-diameter capsule near the boundary eliminates phase
distortion and delivers clear, high-output performance.
To mount the microphone in a ceiling or table top without the isolators, a
20.5 mm ( ⁄ ") diameter hole is required. To mount the microphone with
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the isolators, a 23.5 mm ( 15 ⁄ ") hole is required. Place the isolators on
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RFI-shielding technology,
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either side of the hole to achieve mechanical isolation from the mounting
surface.
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.
Architect's and Engineer's Specifications
The microphone shall be a fixed-charge condenser designed for use
in table, ceiling or panel-mount boundary applications. It shall have an
omnidirectional polar pattern and a frequency response of 40 Hz to
18,000 Hz. The microphone shall operate from an external 11V to 52V
DC phantom power source. It shall be capable of handling sound input
levels up to 142 dB with a dynamic range of 112 dB. Nominal open
circuit output voltage shall be 7 .9 mV at 1 V, 1 Pascal. Output shall be low
impedance balanced (200 ohms). It shall offer outstanding rejection of
radio frequency interference (RFI).
The microphone shall incorporate self-contained electronics, eliminating
the need for an external power module. The output of the microphone
shall be a 3-pin XLRM-type connector.
The microphone shall have a maximum diameter of 28.0 mm (1.10")
and an overall length of 69.0 mm (2.72"). Weight shall be 63 grams
(2.2 oz). The microphone shall be housed in an all-metal case with a two-
layer steel mesh grille. Finish shall be low-reflectance black [white]. The
microphone shall include resilient isolators for reduction of mechanical
noise transfer from the mounting surface.
The Audio-Technica ES945 [ES945W] is specified.
engineered sound microphones
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