• Home
• Brands
• Audio Technica Manuals
• Audio Technica Engineered Sound AT845R
• Audio Technica AT845R Specifications

Audio Technica AT845R Specifications

Download Product information of Audio Technica Engineered Sound AT845R Microphone for Free or View it Online on All-Guides.com. This version of Audio Technica Engineered Sound AT845R Manual compatible with such list of devices, as: Engineered Sound AT845R, Engineered Sound AT845RW, Engineered Sound AT847R, Engineered Sound AT847RW

1

2

Description

The AT845R 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, teleconferencing, profes-

sional recording, television and other demanding

sound pickup applications.

The AT847R is a similar microphone, with a

unidirectional polar pattern. Positioning a properly

designed miniature unidirectional microphone

centrally on a large, flat, unobstructed surface

yields several distinct advantages. The directivity

factor is greatly increased over a comparable

omnidirectional microphone, thus promoting

enhanced gain before feedback and further

suppressing ambient noise. Sensitivity is increased

for improved signal-to-noise ratio. Phase distortion

due to reflected sound energy from the boundary

itself is eliminated.

Both microphones require 9V to 52V DC

phantom power for operation. The microphones

are enclosed in a heavy-duty die-cast case and

protected by two layers of heavy perforated steel.

The low-profile housing has a low-reflectance

black finish. The microphones are also available

in white, as AT845RW and AT847RW. Isolators

are included with each microphone for applications

where mechanical isolation from the mounting

surface is required.

Installation and Operation

Output is low impedance balanced. The bal-

anced 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 these microphones in a ceiling or

table top

without

the isolators, a

13

⁄16" diameter hole

is required. To mount these microphones

with

the

isolators, a

15

⁄16" hole is required. The isolators can

be placed on either side of the hole for mechanical

isolation from the mounting surface.

The Audio-Technica round mark ( ) on the

AT847 bezel indicates the “front” of the microphone.

While a modern fixed-charge condenser

microphone is not unduly sensitive to the environ-

ment, 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

AT845R [AT845RW]

The microphone shall be a fixed-charge

condenser with an omnidirectional polar pattern

designed for use in table, ceiling or panel-mount

applications. The frequency response shall be

30 Hz to 20,000 Hz. The microphone shall operate

from an external 9V to 52V phantom power source.

Nominal open-circuit voltage shall be 7.9 mV at

1 kHz, 1 Pascal. Output shall be low impedance

balanced (200 ohms).

AT845R/RW

Omnidirectional

AT847R/RW

Cardioid

Condenser

Boundary

Microphones

The microphone shall have a self-contained

power module with an XLRM-type output connector.

The microphone shall have a diameter of

1.10" (28.0 mm) and a length of 2.72" (69.0 mm).

Weight shall be 2.1 oz (60 grams). The micro-

phone shall be housed in a die-cast case with a

two-layer perforated steel grille. Finish shall be

low-reflectance black [white].

The Audio-Technica AT845R [AT845RW]

is specified.

AT847R [AT847RW]

The microphone shall be a fixed-charge

condenser with a unidirectional polar pattern

designed for use in table-mount applications. The

frequency response shall be 30 Hz to 20,000 Hz.

The microphone shall operate from an external

9V to 52V phantom power source. Nominal open-

circuit output voltage shall be 7.9 mV at 1 kHz,

1 Pascal. Output shall be low impedance

balanced (200 ohms).

The microphone shall have a self-contained

power module with an XLRM-type output connector.

The microphone shall have a maximum

diameter of 1.18" (30.0 mm) and a length of 2.72"

(69.0 mm). Weight shall be 2.2 oz (62 grams).The

microphone shall be housed in a die-cast case

with a two-layer perforated steel grille. Finish shall

be low-reflectance black [white].

The Audio-Technica AT847R [AT847RW]

is specified.

Frequency in Hertz

Response in dB

10 dB

20k

10k

5k

2k

1k

500

200100

50

LEGEND

12" or more on axis

AT847R Frequency Response

AT845R Frequency Response

Frequency in Hertz

Response in dB

10 dB

20k

10k

5k

2k

1k

500

200100

50

LEGEND

12" or more on axis