propoint
®
microphones
Cardioid Condenser Boundary Microphone
PRO 42
Features
• Wide-range condenser element with low-mass diaphragm for
superior performance
• Uniform cardioid polar pattern for maximum rejection of
unwanted sounds
• Self-contained electronics eliminate need for external power
module
• Rugged design and construction for reliable performance
• Very low-prole design for minimum visibility
Description
The PRO 42 is a wide-range condenser microphone with a cardioid
polar pattern. It was designed for surface-mount applications such as
high-quality sound reinforcement and other demanding sound pickup
situations.
The microphone requires 9V to 52V phantom power for operation.
The microphone's cardioid polar pattern provides a 120° angle of
acceptance (cardioid in hemisphere above mounting surface).
The microphone includes a 7.6 m (25') permanently attached cable with
an XLRM-type connector, which allows it to be plugged directly into an
XLRF-type jack or cable connector.
The microphone’s rubber non-slip bottom pad minimizes mechanical
coupling of surface vibrations to the microphone. The microphone is
enclosed in a rugged case and protected by heavy perforated steel. It
features a low-reectance black nish.
Installation and Operation
The PRO 42 requires 9V to 52V phantom power for operation.
Output 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.
The microphone should be placed on a at,
unobstructed mounting surface, with the
front of the microphone facing the sound
source. The sound source should not be
below, or higher than 60° above, the plane
of the mounting surface.
Avoid leaving the microphone in the open sun or in areas where
temperatures exceed 110° F (43° C) for extended periods of time.
Extremely high humidity should also be avoided.
Architect’s and Engineer’s Specications
The microphone shall be a xed-charge condenser designed for use in
surface-mount applications. It shall have a cardioid polar pattern with
a uniform 120° angle of acceptance (cardioid in hemisphere above
mounting surface) and a frequency response of 70 Hz to 14,000 Hz.
The microphone shall operate from an external 9V to 52V DC phantom
power source. It shall be capable of handling sound input levels up to 134
dB with a dynamic range of 105 dB. Nominal open-circuit output voltage
shall be 12.5 mV at 1V, 1 Pascal. Output shall be low impedance balanced
(100 ohms).
The microphone shall incorporate self-contained electronics, eliminating
the need for an external power module. The microphone shall have a
7.6 m (25') permanently attached cable with an XLRM-type connector for
direct connection to a mating XLRF-type jack or cable connector.
The microphone shall have a maximum width of 36.6 mm (1.44"), a
maximum length of 54.3 mm (2.14") and a maximum height of 15.5 mm
(0.61"). Weight shall be 35 grams (1.2 oz). Finish shall be low-reectance
black.
The Audio-Technica PRO 42 is specied.
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