Audio Technica ES945W Specifications
ES945 & ES945W
Omnidirectional Condenser Boundary Microphones
engineered sound® microphones
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 Specications
The microphone shall be a xed-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).
Features
• Mounts unobtrusively in table-tops, ceilings and wall panels
• Low-prole element provides uniform omnidirectional polar
pattern with 360º acceptance angle
• UniGuard® RFI-shielding technology offers outstanding rejection
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® RFI-shielding technology,
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-prole housing has a low-reectance black nish. The
microphone is also available in white as the ES945W.
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 twolayer steel mesh grille. Finish shall be low-reectance black [white]. The
microphone shall include resilient isolators for reduction of mechanical
noise transfer from the mounting surface.
The Audio-Technica ES945 [ES945W] is specied.
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 at, 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 (13⁄16") diameter hole is required. To mount the microphone with
the isolators, a 23.5 mm (15⁄16") hole is required. Place the isolators on
Specications
Element
Polar pattern
Frequency response
Open circuit sensitivity
Impedance
Maximum input sound level
Dynamic range (typical)
Signal-to-noise ratio
Phantom power requirements
Weight
Dimensions
Output connector
Accessories furnished
In the intere st of standards develo pment, A.T.U.S. offers full
details on it s test methods to othe r industry
1 Pascal = 10 dynes/cm
1
Typical, A-weighted , using Audio Precisio n System One.
Specications are subject to change without notice.
professionals on request.
2
= 10 microba rs = 94 dB SPL
ES945 & ES945W
Fixed-charge back plate, permanently
polarized condenser
Omnidirectional
40-18,000 Hz
–42 dB (7.9 mV) re 1V at 1 Pa
200 ohms
142 dB SPL, 1 kHz at 1% T.H.D.
112 dB, 1 kHz at Max SPL
1
64 dB, 1 kHz at 1 Pa
11-52V DC, 2 mA typical
63 g (2.2 oz)
69.0 mm (2.72") long,
28.0 mm (1.10") diameter
Integral 3-pin XLRM-type
One pair isolators
205
frequency response: 40–18,000 Hz
10 dB
100
12" or more on axis
330˚
200
Frequency in Hertz
0˚
180˚
500
30˚
150˚
5k
2k
1k
60˚
120˚
10k
90˚
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
50
LEGEND
polar pattern
300˚
270˚
240˚
210˚
SCALE IS 5 DECIBELS PER DIVISION
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
©2010 Audio-Technica U.S., Inc. audio-technica.com 0001-0103-01
Response in dB
20k
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