ES945

OMNIDIRECTIONAL CONDENSER

 

 

BOUNDARY MICROPHONE

 

 

 

 

 

 

 

 

DESCRIPTION

The ES945 is a wide-range condenser microphone with an omnidirectional polar pattern. It is designed for unobtrusive table, ceiling or panel-mounted applications for high-quality sound reinforcement, teleconfer- encing, professional recording, television and other demanding sound pickup applications.

The ES945 is equipped with UniGuard™ RFI-shielding tech- nology, which offers outstanding rejection of radio frequency interference (RFI).

The microphone should be placed on a flat, unobstructed mounting surface. The small- diameter capsule near the boundary eliminates phase

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

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 RATIO1

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/cm2 = 10 microbars = 94 dB SPL

1Typical, A-weighted, using Audio Precision System One. Specifications are subject to change without notice.

Polar Pattern

Frequency Response

Response in dB

Frequency in Hertz

LEGEND

 

12" or more on axis

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200Hz 1 kHz 5 kHz 8 kHz

0.79"

20.0 mm

NUT

ISOLATORS

2.72"

69.0 mm

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

0.33"

CEILING

1.10"

28.0 mm

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 case with a two-layer steel mesh grille. Finish shall be low 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.

8.5 mm

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

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Audio-Technica ES945 specifications Omnidirectional Condenser Boundary Microphone, Description, Installation and Operation

ES945 specifications

The Audio-Technica ES945 is a high-performance boundary microphone designed specifically for professional applications in boardrooms, conference rooms, and other environments requiring exceptional audio clarity from discreet placements. This microphone exemplifies Audio-Technica's commitment to quality and craftsmanship.

One of the standout features of the ES945 is its low-profile design, allowing it to blend seamlessly into any setting without drawing attention away from the speaker or the environment. Its elegant appearance and compact size make it an ideal choice for modern meeting rooms and auditoriums.

This microphone employs a low-frequency roll-off filter that minimizes unwanted noise from handling and environmental sounds, ensuring that the audio captured remains clear and focused on the speaker's voice. The ES945 features a cardioid polar pattern, which effectively rejects off-axis sound, making it perfect for isolating speech while reducing background noise. This characteristic is crucial in crowded or noisy environments, where ambient sounds can interfere with audio quality.

Technologically, the ES945 is equipped with a built-in preamp that delivers a consistent signal level, allowing for seamless integration with various audio systems. Its frequency response ranges from 40 Hz to 20 kHz, capturing a wide range of audio frequencies with great precision. This broad frequency response ensures that the microphone is capable of handling diverse vocal types, producing clean and natural sound.

Another notable feature is the microphone's ability to operate with phantom power, making it compatible with most professional audio equipment. Additionally, the ES945 comes with a variety of mounting options, including a desk stand and a ceiling mount, providing flexibility in positioning for optimal sound capture.

The ES945 is also built with durability in mind. Its robust construction withstands the rigors of daily use, ensuring longevity in demanding environments. Overall, the Audio-Technica ES945 boundary microphone stands out as a reliable and high-quality solution for anyone seeking superior audio performance in a stylish, discreet package. With its advanced technology, thoughtful design, and exceptional audio fidelity, the ES945 is an excellent choice for professionals who prioritize clarity and reliability in their audio equipment.
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