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Cardioid Condenser Boundary Microphone
PRO 44
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
• Low-prole design for minimum visibility
Description
The PRO 44 is a wide-range miniature condenser microphone with a
cardioid polar pattern. It is 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') output cable terminating in TA3F-
type and XLRM-type connectors.
The microphone’s rubber non-slip bottom pad minimizes mechanical
coupling of surface vibration to the microphone. The microphone is
enclosed in a rugged housing with a black nish.
Installation and Operation
The PRO 44 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 16,000 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 114
dB with a dynamic range of 86 dB. Nominal open-circuit output voltage
shall be 56.2 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') output cable with TA3F-type to XLRM-type connectors.
The microphone shall have a maximum width of 73.0 mm (2.87"), a
maximum length of 90.5 mm (3.56") and a maximum height of 15.5 mm
(0.59"). Weight shall be 67 grams (2.4 oz). Finish shall be low-reectance
black.
The Audio-Technica PRO 44 is specied.
60°
IDEAL
WORKING
ANGLE