The PRO42 is a wide-range miniature condenser microphone with a hemi-cardioid (half-space cardioid) polar pattern. It was designed for surface-mounted applications in high-quality sound reinforcement and other demanding sound pickup situations. Its small size makes the PRO42 ideal for use in applications where minimum visibility is required. The PRO42 features a 25′ (7.6 m) permanently-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 52VDC phantom power source.
With the 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. Positioning a properly designed miniature unidirectional microphone centrally on a large, flat, unobstructed surface yields several distinct advantages. Directionality is increased by 3 dB, promoting enhanced gain before feedback and further suppression of ambient noise. Sensitivity is increased for improved signal-to-noise ratio. Phase distortion due to reflected sound energy from the boundary itself is eliminated.
The microphone element is enclosed in a rugged case and protected by heavy perforated steel. The rubber non-slip bottom pad minimizes mechanical coupling of surface vibrations to the microphone. The low-profile housing has a low-reflectance black finish.
POLAR PATTERN: Cardioid
FREQUENCY RESPONSE: 70-14,000 Hz
IMPEDANCE: 100 ohms
POWER: 9-52V DC, 2 mA typical
WEIGHT: 1.2 oz (35 grams)
DIMENSIONS: 1.44″ (36.6 mm) max width,
2.14″ (54.3 mm) max length,
0.61″ (15.5 mm) height
Datasheet: PRO-42 Datasheet (PDF)