Audio-Technica ES945 - Manual

DESCRIPTION

T h e E S 9 4 5 i s a w i d e - r a n g e
condenser microphone with an
o m n i d i r e c t i o n a l p o l a r p a t t e r n .
I t i s d e s i g n e d fo r u n o b t r u s i ve
table, ceiling or panel-mounted
a p p l i c a t i o n s f o r h i g h - q u a l i t y
sound reinforcement, teleconfer-
encing, professional recording,
television and other demanding
sound pickup applications.

T h e E S 9 4 5 i s e q u i p p e d w i t h
UniGuard

™

RFI-shielding tech-

nology, which offers outstanding
r e j e c t i o n o f r a d i o f r e q u e n c y
interference (RFI).

T h e m i c r o p h o n e s h o u l d b e
placed on a flat, unobstr ucted
m o u n t i n g s u r fa c e. T h e s m a l l -
d i a m e t e r c a p s u l e n e a r t h e
b o u n d a r y e l i m i n a t e s p h a s e

distortion and delivers clear, high-output performance.

The microphone requires 11V to 52V phantom power for operation.
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 (shown above). Isolators are included with
the microphone for optional mechanical isolation from the mounting
surface.

INSTALLATION AND OPERATION

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.

To mount the ES945 in a ceiling or table top

without

the isolators,

a

13

⁄

16

" (20.5 mm) diameter hole is required

. To mount the ES945

with

the isolators, a

15

⁄

16

" (23.5 mm) hole is required

. Place the

isolators on either side of the hole to achieve mechanical isolation
from the mounting surface.

While a modern fixed-charge condenser microphone is not unduly
sensitive to the environment, temperature extremes can be harmful.
Exposure to high temperature can result in gradual and permanent
reduction of the output level. 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.

ARCHITECTS AND ENGINEERS SPECIFICATIONS

The microphone shall be a fixed-charge condenser designed
for use in table, ceiling or panel-mount boundary applications. It
shall have a frequency response of 40 Hz to 18,000 Hz and an
omnidirectional polar pattern. It shall have a self-contained power
module and shall operate from an external 11V to 52V DC phantom
power source. It shall offer outstanding rejection of radio frequency
interference (RFI). 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 kHz, 1 Pascal. Output
shall be low impedance balanced (200 ohms) from an integral 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
c a s e w i t h a t w o - l aye r s t e e l m e s h g r i l l e . F i n i s h s h a l l b e l o w
reflectance black [white]. Resilient isolators shall be provided for
reduction of mechanical noise transfer from the mounting panel.
The Audio -Technica ES945 [ES945W] is specified.

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz
5 kHz

Frequency in Hertz

LEGEND

12" or more on axis

Frequency Response

Response in dB

Audio -Technica U.S., Inc.,

1221 Commerce Drive, Stow, Ohio 44224

Audio -Technica Limited,

Old Lane, Leeds LS11 8AG England

www.audio-technica.com

P51943 ©2007 Audio -Technica U.S., Inc. Printed in Japan

ES945

ES945 SPECIFICATIONS

†

ELEMENT

Fixed-charge back plate
permanently polarized condenser

POLAR PATTERN

Omnidirectional

FREQUENCY RESPONSE

40-18,000 Hz

OPEN CIRCUIT SENSITIVITY

–42 dB (7.9 mV) re 1V at 1 Pa*

IMPEDANCE

200 ohms

MAXIMUM INPUT SOUND LEVEL

142 dB SPL, 1 kHz at 1% T.H.D.

DYNAMIC RANGE

(typical)

112 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO

1

64 dB, 1 kHz at 1 Pa*

PHANTOM POWER REQUIREMENTS

11-52V DC, 2 mA typical

WEIGHT

63 g (2.2 oz)

DIMENSIONS

28.0 mm (1.10") diameter,
69.0 mm (2.72") length

OUTPUT CONNECTOR

Integral 3-pin XLRM-type

ACCESSORY FURNISHED

One pair isolators

†In the interest of standards development, A.T.U.S. offers full details on its test

methods to other industry professionals on request.

*1 Pascal = 10 dynes/cm

2

= 10 microbars = 94 dB SPL

1

Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.

OMNIDIRECTIONAL CONDENSER
BOUNDARY MICROPHONE

0.79"

20.0 mm

ISOLATORS

CEILING

1.10"

28.0 mm

0.33"

8.5 mm

2.72"

69.0 mm

NUT