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AT825
ONEPOINT
• Designed for broadcast and professional recording, and DAT
field use
• Pair of closely-matched cardioid elements provides the spatial
impact and realism of a live sound field
• Compact, lightweight design is perfect for camera-mount use
• Excellent channel separation
• Switchable low-frequency roll-off
• Operates on battery or phantom power
The AT825 requires 5-52V DC phantom power, or a 1.5V AA
battery for operation. A battery need not be in place for phantom
power operation.
Battery installation: Unscrew the upper section of the microphone
body to reveal the battery compartment. Insert a fresh 1.5V AA
battery in the handle compartment ("+" end up), then reassemble
the microphone. Alkaline batteries are recommended for longest
life. Remove the battery during long-term storage.
Output for each stereo channel is low impedance (Lo-Z) balanced.
The balanced signals appear across Pin 2 and 3 for the left
channel, Pins 4 and 5 for the right channel. 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.
Locating the AT825 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 AT825 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.
®
X/Y STEREO FIELD RECORDING MICROPHONE
AT825 SPECIFICATIONS
†
ELEMENTS
POLAR PATTERN
FREQUENCY RESPONSE
LOW-FREQUENCY ROLL-OFF
OPEN CIRCUIT SENSITIVITY
CHANNEL BALANCE
IMPEDANCE
MAXIMUM INPUT SOUND LEVEL
SIGNAL-TO-NOISE RATIO
1
DYNAMIC RANGE (typical)
PHANTOM POWER
REQUIREMENTS
BATTERY TYPE
BATTERY CURRENT / LIFE
(intermittent use)
SWITCH
WEIGHT (less cable and accessories)
DIMENSIONS
OUTPUT CONNECTOR
CABLE
ACCESSORIES FURNISHED
† 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
= 10 microbars = 94 dB SPL
2
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
Mono (L+R)
Polar Pattern
0
30
330
300
60
270
90
240
120
50
100
210
150
180
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
1 kHz
Stereo
Polar Pattern
0
30
330
4
300
60
3
2
270
90
240
120
210
150
180
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
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
P51657-EN
©2004 Audio-Technica U.S., Inc.
Fixed-charge back plate
permanently polarized
condenser
X/Y stereo
30-20,000 Hz
150 Hz, 6 dB/octave
–47 dB (4.4 mV) re 1V at 1 Pa*
≤ 2.5 dB
200 ohms balanced
126 dB SPL, 1 kHz at 1% T.H.D.
70 dB, 1 kHz at 1 Pa*
102 dB, 1 kHz at Max SPL
5-52V DC, 2 mA typical
(each channel)
1.5V AA/UM3
2 mA / 1000 hours typical
(alkaline)
Flat, roll-off (recessed)
8.5 oz (240 g)
8.43" (214.0 mm) long,
2.44" (62.0 mm) head width,
0.83" (21.0 mm) body diameter
Integral 5-pin XLRM-type
16.5' (5 m) long, 8 conductors
under two shields, vinyl-jacketed,
stereo cable with 5-pin XLRF-
type connector at microphone
end, two 3-pin XLRM-type
connectors at output end
AT8405a stand clamp for
/
"-27
5
8
threaded stands; battery;
AT8120 windscreen; soft
protective pouch
Frequency Response
200
500
1k
2k
5k
10k
20k
Frequency in Hertz
12" or more on axis (flat)
Roll-off
Five-pin XLRF-type Plug Wiring
5
1
PIN 1 – SHIELD LEFT & RIGHT
PIN 4 – YEL / YEL RIGHT
PIN 2 – YEL / YEL LEFT
PIN 5 – RED/RED RIGHT
PIN 3 – RED/RED LEFT
Printed in Japan
10 dB
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