Audio Technica ES947W Specifications
ES947 & ES947W
Cardioid Condenser Boundary Microphones
Features
• Mounts unobtrusively in table-tops, ceilings and wall panels
• Low-prole element provides uniform cardioid polar pattern with
120º 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 (ES947) and white (ES947W)
Description
The ES947 is a wide-range condenser microphone with a cardioid 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.
engineered sound® microphones
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
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 a
cardioid polar pattern with a uniform 120° angle of acceptance (cardioid
in hemisphere above mounting surface) and a frequency response of 40
Hz to 12,000 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 113 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 30.0 mm (1.18")
and an overall length of 69.0 mm (2.72"). Weight shall be 64 grams (2.3
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 ES947 [ES947W] is specied.
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.
The microphone's cardioid polar pattern provides a 120° angle of
acceptance (cardioid in hemisphere above mounting surface).
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 ES947W.
Installation and Operation
The ES947 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
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
ES947 & ES947W
Fixed-charge back plate, permanently
polarized condenser
Half-cardioid (cardioid in hemisphere
above mounting surface)
40-12,000 Hz
–42 dB (7.9 mV) re 1V at 1 Pa
200 ohms
142 dB SPL, 1 kHz at 1% T.H.D.
113 dB, 1 kHz at Max SPL
1
65 dB, 1 kHz at 1 Pa
11-52V DC, 2 mA typical
64 g (2.3 oz)
69.0 mm (2.72") long,
30.0 mm (1.18") diameter
Integral 3-pin XLRM-type
One pair isolators
207
frequency response: 40–12,000 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 0001-0104-01
Response in dB
20k
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