AT849 STEREO BOUNDARY MICROPHONE

Designed for surface-mount applications in broadcast, professional recording and sound reinforcement

Low-profile design for minimum visibility

Pair of closely-matched cardioid elements provides the spatial impact and realism of a live sound field

The combination of a rugged die-cast case and rubber non-slip bottom pad minimizes mechanical coupling of surface vibrations to the microphone

Switchable low-frequency roll-off

The AT849 requires 9V to 52V DC phantom power on each channel for operation.

Output for each stereo channel is low impedance (Lo-Z) balanced. The balanced signals of the TB5M output connector appear across Pins 2 and 3 for the left channel, Pins 4 and 5 for the right channel.

AT849 SPECIFICATIONS

ELEMENTS

Fixed-charge back plate

 

permanently polarized

 

condenser

 

 

POLAR PATTERN

X/Y stereo

 

 

FREQUENCY RESPONSE

30-20,000 Hz

 

 

LOW FREQUENCY ROLL-OFF

150 Hz, 6 dB/octave

 

 

OPEN CIRCUIT SENSITIVITY

–40 dB (10.0 mV) re 1V at 1 Pa*

 

 

CHANNEL BALANCE

2.5 dB

 

 

IMPEDANCE

200 ohms balanced

 

 

MAXIMUM INPUT SOUND LEVEL

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

 

 

SIGNAL-TO-NOISE RATIO1

67 dB, 1 kHz at 1 Pa*

DYNAMIC RANGE (typical)

110 dB, 1 kHz at Max SPL

 

 

PHANTOM POWER

9-52V DC, 2 mA typical

REQUIREMENTS

(each channel)

 

 

SWITCH

Flat, roll-off

 

 

WEIGHT (less cable and accessory)

5.3 oz (149 grams)

 

 

DIMENSIONS

3.62" (92.0 mm) maximum

 

length,

 

2.87" (73.0 mm) maximum width

 

 

OUTPUT CONNECTOR

Integral 5-pin TB5M

 

 

CABLE

25' (7.6 m) long, shielded,

 

vinyl-jacketed, stereo cable with

 

5-pin TA5F connector at

 

microphone end, two 3-pin

 

XLRM-type connectors at

 

output end

 

 

ACCESSORY FURNISHED

Soft protective pouch

 

 

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

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

Pin 1 is ground (shield) for both channels. Output is “Pins 2 and 4 hot” – positive acoustic pressure produces positive voltage at Pins 2 and 4.

The 3-pin XLRM cable connectors for the left and right channels are marked with gray and red bands, respectively. 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 symmetry and area of the mounting

surface directly affect the sensitivity of the

 

Stereo

 

Polar Pattern

 

0°

330°

30°

300°

60°

270°

90°

240°

120°

210°

150°

 

180°

SCALE IS 5 DECIBELS PER DIVISION

 

 

 

Frequency Response

 

 

 

 

 

 

 

 

 

 

 

10 dB

50

100

200

500

1k

2k

5k

10k

20k

 

 

 

Frequency in Hertz

 

 

 

 

LEGEND

 

12" or more on axis (flat)

Response in dB

 

 

 

 

 

 

AT849 at low frequencies, as well as the overall

60°

 

 

 

 

 

stereo balance and image. The microphone

IDEAL

WORKING

should be centered on the surface and

ANGLE

 

 

 

 

 

 

positioned with the microphone facing the

 

 

 

 

 

 

sound source. The sound source should not

 

 

 

 

 

 

be below, or higher than 60° above, the plane of the mounting surface.

Locating the AT849 nearer the sound source enhances the width of the stereo image, while decreasing room ambience. Conversely, as the mic position moves away from the sound source, a narrower left/right stereo image results and more of the “room sound” is noted.

The high sensitivity of the AT849 assures useful output and an excellent match to most inputs. However, the microphone’s high output may overload some sensitive electronic input stages under some conditions. Many pre-amps and mixers include a mic pad or input attenuator control to prevent overload; or, use an AT8202 attenuator or equal at the input.

Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided.

LEGEND

Roll-off

LEFT

RIGHT

1 kHz

1 kHz

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

Audio-Technica Limited, Old Lane, Leeds LS11 8AG England

www.audio-technica.com

P51660-EN ©2004 Audio-Technica U.S., Inc. Printed in Japan

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Audio-Technica specifications AT849 Stereo Boundary Microphone

AT849 specifications

The Audio-Technica AT849 is a premium-quality clip-on lavalier microphone designed for professional applications where high-quality audio is crucial. Known for its reliability and exceptional sound reproduction, the AT849 is particularly popular among broadcasters, podcasters, and content creators who require a discreet yet powerful microphone solution.

One of the standout features of the AT849 is its omnidirectional polar pattern, which captures sound equally from all directions. This characteristic makes it highly effective for interviews, presentations, and performances, as it can pick up the speaker's voice even if they turn away from the microphone briefly. The result is a natural and balanced sound that minimizes background noise and captures the nuances of the spoken word.

In terms of construction, the AT849 is built to last. It boasts a rugged and durable design, ensuring that it can withstand the rigors of daily use in various environments. The microphone is equipped with a metal housing that not only adds to its durability but also reduces handling noise, providing a clean audio signal with minimal interference.

As for its technological features, the AT849 utilizes a state-of-the-art condenser capsule that delivers a wide frequency response, allowing it to reproduce the full depth of sounds with exceptional clarity. This makes the microphone highly versatile, suitable for vocals, instruments, and even ambient sounds, making it an essential tool for professional audio recording.

The AT849 also includes a low-frequency roll-off switch that helps reduce unwanted low-frequency noise, which can be particularly useful for eliminating rumble or handling noise during recordings. Additionally, its lightweight design makes it comfortable to wear for prolonged periods without causing fatigue, an essential feature for on-stage performers and presenters.

Audio-Technica has also incorporated a variety of accessories with the AT849, including a windscreen to minimize wind noise during outdoor use, a clothing clip for secure attachment, and a carrying case for easy transport and storage.

In summary, the Audio-Technica AT849 is a highly versatile and reliable lavalier microphone that combines exceptional sound quality, durability, and user-friendly features. Its omnidirectional pickup pattern, condenser technology, and lightweight design set it apart as an ideal choice for professionals seeking high-performance audio solutions in a compact form factor. Whether for broadcasting, interviews, or recordings, the AT849 delivers performance that professionals can count on.