SCALE IS 5 DECIBELS PER DIVISION
P
Polar Pattern
D
200 Hz
LEGEND
5 kHz
1 kHz
8 kHz
240
180
210
270
300
330
0
150
120
90
30
60
12" or more on axis
100
50
200
LEGEND
Roll-off
10k
5k
1k
500
2k
20k
Frequency in Hertz
Frequency Response
Response in dB
10 dB
• Provides articulate, full-sounding voice and instrument pickup
• Excels in pickup of acoustic guitar with included AT8444 guitar
mount
• Switchable low-frequency roll-off
• Corrosion-resistant contacts from gold-plated XLRM-type
connector
• Cardioid polar pattern reduces pickup of sounds from the sides
and rear, improving isolation of desired sound source
• Operates on battery or phantom power
For use as a lavalier, attach the microphone about six inches below
the chin. Anticipate movements that may cause the microphone to
rub against or be covered by clothing, and position the microphone
to avoid it.
The PRO 70 requires 11-52V 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.
To avoid phase cancellation and poor sound, all mic cables must be
wired consistently: Pin 1-to-Pin 1, etc.
An integral 80 Hz high-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position
reduces the pickup of low-frequency ambient noise (such as traffic,
air-handling systems, etc.), room reverberation and mechanically
coupled vibrations.
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 70 SPECIFICATIONS
†
ELEMENT Fixed-charge back plate
permanently polarized condenser
POLAR PATTERN Cardioid
FREQUENCY RESPONSE 100-14,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 8 dB/octave
OPEN CIRCUIT SENSITIVITY –45 dB (5.6 mV) /
(Phantom / Battery) –45 dB (5.6 mV) re 1V at 1 Pa*
IMPEDANCE (Phantom / Battery) 200 ohms / 200 ohms
MAXIMUM INPUT SOUND LEVEL 123 dB / 123 dB SPL, 1 kHz at 1% T.H.D.
(Phantom / Battery)
DYNAMIC RANGE (typical) 96 dB / 96 dB, 1 kHz at Max SPL
(Phantom / Battery)
SIGNAL-TO-NOISE RATIO
1
67 dB, 1 kHz at 1 Pa*
PHANTOM POWER REQUIREMENTS 11- 52V DC, 2 mA typical
BATTERY TYPE 1.5V AA/UM3
BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical
(alkaline)
SWITCH Off, on-flat, on-roll-off
WEIGHT (less cable and accessories)
MICROPHONE 0.3 oz (8 g)
POWER MODULE 4.7 oz (134 g)
DIMENSIONS
MICROPHONE
0.98" (25.0 mm) long,
0.40" (10.2 mm) diameter
POWER MODULE 3.27" (83.0 mm) H x
2.48" (63.0 mm) W x
0.87" (22.0 mm) D
OUTPUT CONNECTOR Integral 3-pin XLRM-type
(power module)
CABLE Integral 6' (1.8 m), permanently
attached between microphone and
power module
ACCESSORIES FURNISHED AT8411 clothing clip;
AT8444 instrument adapter;
power module; windscreen;
battery; 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 /cm
2
= 10 microbars = 94 dB SPL
1
Typical, A-weighted, using Audio Precision 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
P51684-EN ©2004 Audio-Technica U.S., Inc. Printed in Taiwan
PRO 70
CARDIOID CONDENSER
LAVALIER/INSTRUMENT MICROPHONE
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