SCALE IS 5 DECIBELS PER DIVISION
Polar Pattern
LEGEND
1 kHz
240
180
210
270
300
330
0
150
120
90
30
60
1 kHz
LEFT RIGHT
12" or more on axis
100
50 200
LEGEND
10k
5k
1k
500 2k 20k
Frequency in Hertz
Frequency Response
Response in dB
10 dB
• Designed for a wide range of stereo applications, including
field recording, video production and studio use
• Offers the convenience of high-quality stereo pickup in a single
microphone
• Compact, lightweight design is perfect for camera-mount use
• Battery-free operation when used with recording devices that
provide plug-in power at the mic input
• Pair of cardioid condenser elements in X/Y configuration provides
the spatial impact and realism of a live sound field
• Professional condenser circuitry ensures excellent sound quality
• On/off switch for convenient operation
The PRO 24 is designed for either battery operation or for battery-
free operation when used with recording devices that provide plug-
in power (2-10 volts DC) at the mic input. If used without plug-in
power, install the battery before attempting use. If used with
a recording device equipped for plug-in power, simply plug the
microphone cable’s stereo mini-plug directly into the recording
device’s microphone input. No battery is needed when the PRO 24
is used with plug-in power.
Battery installation: Unscrew the lower section of the microphone
and slide it down to reveal the battery compartment. Insert the
battery being certain to observe polarity as indicated (+ end toward
the front of the microphone). Close and secure the cover. Remove
the battery during long-term storage.
Output for each stereo channel is low impedance (Lo-Z)
unbalanced. The included 6' (1.8 m) shielded cable features a
3.5 mm stereo mini-plug at the output end.
Locating the PRO 24 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.
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.
PRO 24 SPECIFICATIONS†
ELEMENTS Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN X/Y Stereo
FREQUENCY RESPONSE 100-17,000 Hz
OPEN CIRCUIT SENSITIVITY –50 dB (3.1 mV) re 1V at 1 Pa*
IMPEDANCE 600 ohms
MAXIMUM INPUT SOUND LEVEL 119 dB SPL, 1 kHz at 1%T.H.D.
DYNAMIC RANGE (typical) 82 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO157 dB, 1 kHz at 1 Pa*
POWER REQUIREMENTS 2-10V DC plug-in power
BATTERY TYPE 1.5V LR44
BATTERY CURRENT / LIFE 0.6 mA / 200 hours typical
SWITCH On/off
WEIGHT 3.9 oz (111 g)
DIMENSIONS 4.59" (116.5 mm) long,
0.83" (21.0 mm) maximum body
diameter
OUTPUT CONNECTOR 3.5 mm stereo mini plug on cable
CABLE Permanently attached 6' (1.8 m)
cable with 3.5 mm stereo plug at
output end
ACCESSORIES FURNISHED AT8405a stand clamp for 5/8"-27
threaded stands; 5/8"-27 to 3/8"-16
threaded adapter; LR44 battery;
windscreen; 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/cm2= 10 microbars = 94 dB SPL
1Typical, A-weighted, using Audio Percision System One.
Specifications are subject to change without notice.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51675-EN ©2004 Audio-Technica U.S., Inc. Printed in Taiwan
PRO 24 STEREO CONDENSER MICROPHONE
