Audio-Technica ATM73A LEX780064 Dépliant

• Ideal for drummers, keyboard players or anyone requiring 

hands-free operation 

• Comfortable, unobtrusive headband design with side-of-mouth 

pickup

• Belt-mounted power module operates on battery or phantom 

power 

• Cardioid polar pattern improves isolation of desired sound source 

• Also available as ATM73cW – less power module; 55" (1.4 m) 

cable terminated with locking 4-pin connector for A-T UniPak

™

wireless systems 

The ATM73a requires 11V to 52V DC phantom power or a 1.5V AA
battery for operation. A battery need not be in place for phantom
power operation.

Battery installation: Remove the cap from the top of the power 
module. Insert a fresh 1.5V AA battery (“+” end toward the cap
release button), then reassemble the power module. Alkaline 
batteries are recommended for longest life. Remove the battery 
during long-term storage.

Output from the power module's XLRM-type connector is low 
impedance (Lo-Z) balanced. 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.

An integral 80 Hz high-pass UniSteep

®

filter provides easy switching

from a flat frequency response to a low-end roll-off. The roll-off 
position reduces the microphone's sensitivity to popping in close
vocal use. It also reduces the pickup of low-frequency ambient noise
(such as traffic, air-handling systems, etc.), room reverberation and
mechanically coupled vibrations.

For maximum stability and minimum visibility, the headband should
be worn around the back of the head, with each cushioned support
pad resting on the temple in front of the ear. The cable should
remain clipped to the headband, with some slack at the boom 
connection. The headset is designed so the microphone descends
from the left support pad.

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.

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

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

www.audio-technica.com

P51807     ©2006  Audio-Technica U.S., Inc.    Printed in Japan

Fixed-charge back plate
permanently polarized condenser

Cardioid 

40-15,000 Hz

80 Hz, 18 dB/octave

–55 dB (1.7 mV) / 

(Phantom / Battery)

–56 dB (1.5 mV) re 1V at 1 Pa*

IMPEDANCE (Phantom / Battery)

200 ohms / 270 ohms

146 dB / 132 dB SPL, 

(Phantom / Battery)

1 kHz at 1% T.H.D.

DYNAMIC RANGE (typical)

111 dB / 97 dB, 

(Phantom / Battery)

1 kHz at Max SPL

59 dB, 1 kHz at 1 Pa*

PHANTOM POWER REQUIREMENTS 11-52V DC, 2 mA typical

1.5V AA/UM3

0.4 mA / 1200 hours typical 
(alkaline)

Off, on-flat, on-roll-off

1.1 oz (31 g)

4.9 oz (139 g)

6.49" (165.0 mm) nominal at 
widest point, 
2.64" (67.0 mm) flexible boom

0.39" (10.0 mm) diameter

3.31" (84.0 mm) H x 
2.48" (63.0 mm) W x 
0.87" (22.0 mm) D 

Integral 3-pin XLRM-type

(power module)

4.6' (1.4 m) long (permanently 
attached to microphone), 0.10"
(2.6 mm) diameter, 2-conductor
shielded cable with TA3F-type 
connector  

AT8531 power module; AT8128 
windscreen; AT8125 windscreen;
battery 

†

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.

8 kHz

SCALE IS 5 DECIBELS PER DIVISION

LEGEND

200 Hz

1 kHz
5 kHz

Frequency in Hertz

LEGEND

12" or more on axis

Roll-off

Response in dB