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PRO 70
CARDIOID CONDENSER
LAVALIER/INSTRUMENT MICROPHONE
• 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
POLAR PATTERN
FREQUENCY RESPONSE
LOW FREQUENCY ROLL-OFF
OPEN CIRCUIT SENSITIVITY
(Phantom / Battery)
IMPEDANCE (Phantom / Battery)
MAXIMUM INPUT SOUND LEVEL
(Phantom / Battery)
DYNAMIC RANGE (typical)
(Phantom / Battery)
SIGNAL-TO-NOISE RATIO
1
PHANTOM POWER REQUIREMENTS
BATTERY TYPE
BATTERY CURRENT / LIFE
SWITCH
WEIGHT (less cable and accessories)
MICROPHONE
POWER MODULE
DIMENSIONS
MICROPHONE
POWER MODULE
OUTPUT CONNECTOR
(power module)
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
2
= 10 microbars = 94 dB SPL
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
P
Polar Pattern
0
330
30
300
60
270
90
240
120
210
150
180
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
D
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
Fixed-charge back plate
permanently polarized condenser
Cardioid
100-14,000 Hz
80 Hz, 8 dB/octave
– 45 dB (5.6 mV) /
– 45 dB (5.6 mV) re 1V at 1 Pa*
200 ohms / 200 ohms
123 dB / 123 dB SPL, 1 kHz at 1% T.H.D.
96 dB / 96 dB, 1 kHz at Max SPL
67 dB, 1 kHz at 1 Pa*
11- 52V DC, 2 mA typical
1.5V AA/UM3
0.4 mA / 1200 hours typical
(alkaline)
Off, on-flat, on-roll-off
0.3 oz (8 g)
4.7 oz (134 g)
0.98" (25.0 mm) long,
0.40" (10.2 mm) diameter
3.27" (83.0 mm) H x
2.48" (63.0 mm) W x
0.87" (22.0 mm) D
Integral 3-pin XLRM-type
Integral 6' (1.8 m), permanently
attached between microphone and
power module
AT8411 clothing clip;
AT8444 instrument adapter;
power module; windscreen;
battery; soft protective pouch
Frequency Response
50
100
200
500
1k
2k
5k
Frequency in Hertz
12" or more on axis
Roll-off
©2004 Audio-Technica U.S., Inc.
Printed in Taiwan
10 dB
10k
20k
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