Audio Technica PRO 47T Specifications

PRO 47 T and PRO 47 TL
REMOTE-POWERED
CARDIOID CONDENSER
THREAD-MOUNT GOOSENECK
MICROPHONES
Description
The PRO 47 is a wide-range condenser
T
microphone with a cardioid (unidirectional)
polar pattern. It was designed for high-quality
sound reinforcement and other demanding
sound pickup situations. Standing 12.40"
above the mounting surface, its small-diameter
alternating gooseneck design permits highly
flexible positioning while maintaining a smooth,
well-contoured appearance. The PRO 47
a 15.79" version of this microphone.
The PRO 47 T features a 9.8' (3.0 m) perma-
nently-attached miniature cable with an
XLRM-type connector, which allows it to be
plugged directly into an XLRF-type jack or
cable connector. The unit's integral electronics
can be powered from any external 9V to 52V
DC phantom power source.
Audio-Technica design engineers have utilized
the newest low-mass technology in the quest
for superior performance. The charge is now on
the fixed back plate, rather than the moving
element. With the A-T fixed-charge "back plate"
construction, a gold-vaporized diaphragm just
2 microns thick (about 0.000079") can be
used. This reduces moving mass substantially,
improving frequency response and transient
response while reducing distortion.
The microphone element is enclosed in a
rugged housing with a low-reflectance black
finish. A 5 / "-27 threaded flange allows the
8
microphone to mate with the threads of a
standard microphone desk or floor stand. A
5 / "-27 threaded stud is also provided so it can
8
be secured to a permanent mounting surface.
Operation and Maintenance
Output is low impedance balanced. The output
connector mates with XLRF-type connectors.
The balanced signal appears across Pins 2
and 3, while the ground (shield) connection is
Pin 1. Output is phased so that positive
acoustic pressure produces positive voltage
at Pin 2 in accordance with industry conven-
tion.
DC phantom power (9-52 volts) must be
applied equally to Pins 2 and 3, with the ground
for the power supply connected to Pin 1. This
can be provided by a console or mixer with
built-in phantom voltage or with the addition
of an in-line phantom power supply, such as
the recommended Audio-Technica CP8506
and AT8801 power supplies.
If an extension cable is necessary, AT8314
cable (or equal) should be used. Regardless
of cables used, it is important that both ends
of each cable are wired consistently, with the
shield always connected to Pin 1 at both
ends, Pin 2 connected to Pin 2, and Pin 3 to
Pin 3. This will ensure that all microphones are
electrically in phase and reduce problems of
uneven response and sound cancellation
when two microphones are used close to each
other.
The high sensitivity of the PRO 47
useful output and an excellent match to most
mixer, tape recorder and amplifier inputs.
is
TL
It will provide undistorted output even in
sound fields as loud as 134 dB SPL. However,
due to the high sensitivity, in some instances
it may be possible to overload sensitive input
stages. If distortion occurs, first check for
input overload. In such cases, an attenuator
such as the Audio-Technica AT8202 may be
required between the mic and the electronics
input. (Also, many mixers provide "input pad"
switches to reduce mic-input signal levels.)
The provided AT8146 windscreen simply slips
over the head of the microphone, effectively
reducing wind noise or "popping" when used
extra close.
The small-diameter gooseneck is very easy
to manipulate for proper positioning. It is
heavily lubricated to offer very smooth and
quiet operation. Should it become noisy with
prolonged use, apply a light machine oil
directly on the gooseneck area affected.
While a modern condenser microphone is
not unduly sensitive to the environment, tem-
perature extremes can be harmful. Exposure
to high temperatures can result in gradual
and permanent reduction of the output level.
Avoid leaving the microphone in the open sun
or in areas where temperatures exceed 110° F
(43° C) for long periods of time. Extremely
high humidity should also be avoided.
Frequency Response
50 100 200
LEGEND 12" or more on axis
ensures
T
10 dB
500
1k 2k 5k 10k 20k
Frequency in Hertz