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Form No. 0309-2128-00    P51563   © 2003 Audio-Technica U.S., Inc. Printed in U.S.A.

Elements

Two fixed-charge 
back plate 
permanently 
polarized condensers

Polar Pattern

Cardioid

Frequency Response

90–15,000 Hz

Low-frequency Roll-off

Fixed 120 Hz,
12 dB/octave

Open Circuit Sensitivity

– 41 dB (8.9 mV) 
re 1V at 1 Pa

*

Impedance

250 ohms

Maximum Input Sound 

138 dB SPL, 1 kHz at

Level

1% T.H.D.

Dynamic Range 

109 dB, 1 kHz at 

(Typical)

Max SPL

Signal-to-noise Ratio

1

65 dB, 1 kHz at 1 Pa

*

Switch

Normal/–15 dB

Phantom Power

11–52V DC, 3 mA 

Requirements

typical

Weight

8.8 oz (250 g)

Dimensions

21.57" (548.0 mm) 
maximum length,
1.51" (38.4 mm) 
head diameter, 0.99" 
(25.1 mm) base 
diameter

Output Connector

Integral 6-pin 
Neutrik XLRM

Cable

30' (9.1 m) 
6-conductor shielded 
“Y” cable–6-pin 
XLRF to two 3-pin 
XLRM

Accessories Furnished

AT8407 stand clamp,
6-pin panel-mount 
XLRF-type 
connector

Optional 

ESE-H hypercardioid

Interchangeable

(100°)

Elements

ESE-O 
omnidirectional 
(360°)

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.

One-Year Limited Warranty

Audio-Technica microphones and accessories purchased in the U.S.A. are warranted for one year from date of 
purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be free of defects in materials and workmanship. In event of such
defect, product will be repaired promptly without charge or, at our option, replaced with a new product of equal or
superior value if delivered to A.T.U.S. or an Authorized Service Center, prepaid, together with the sales slip or other
proof of purchase date. 

Prior approval from A.T.U.S. is required for return. 

This warranty excludes defects due 

to normal wear, abuse, shipping damage, or failure to use product in accordance with instructions. This warranty 
is void in the event of unauthorized repair or modification.

For return approval and shipping information, 

contact the Service Department, Audio-Technica U.S., Inc., 1221

Commerce Drive, Stow, Ohio 44224.

Except to the extent precluded by applicable state law, 

A.T.U.S. will have no liability for any consequential, 

incidental, or special damages; any warranty of merchantability or fitness for particular purpose expires
when this warranty expires.

This warranty gives you specific legal rights, and you may have other rights, which vary from state to state.

Outside the U.S.A., please contact your local dealer for warranty details.

[

ES991 Specifications

]

Polar Pattern 

]

SCALE IS 5 DECIBELS PER DIVISION

200 Hz

LEGEND

5 kHz

1 kHz

8 kHz

240

180

210

270

300

330

0

150

120

90

30

60

[

Visit our Web site at www.audio-technica.com 

]

Audio-Technica U.S., Inc.

1221 Commerce Drive, Stow, Ohio  44224

Frequency Response 

]

12" or more on axis

100

50

200

LEGEND

10k

5k

1k

500

2k

20k

Frequency in Hertz

Response in dB

10 dB

Dimensions 

]

548.0 mm

21.57"

1.51"

38.4 mm

2.20"

56.0 mm

8.1 mm

0.32"

25.1 mm

0.99"

93.4 mm

3.68"

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