The PRO 42 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 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.
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.
| Element | Fixed-charge back plate, permanently polarized condenser |
|---|---|
| Polar Pattern | Half-cardioid (cardioid in hemisphere above mounting surface) |
| Frequency Response | 70 - 14,000 Hz |
| Open Circuit Sensitivity | -38 dB (12.5 mV) re 1V at 1 Pa |
| Impedance | 100 ohms |
| Maximum Input Sound Level | 134 dB SPL, 1 kHz at 1% T.H.D. |
| Dynamic Range (Typical) | 105 dB, 1 kHz at Max. SPL |
| Signal-To-Noise Ratio | 65 dB, 1 kHz at 1 Pa |
| Phantom Power Requirements | 9-52V DC, 2 mA typical |
| Output Connector | XLRM-type on cable |
| Cable | 25' (7.6 m) long, permanently attached |
| Dimensions (H x W x L) | 0.61" (15.5 mm) x 1.44" (36.6 mm) x 2.14" (54.3 mm) |
| Weight | 1.2 oz (35 g) |
Usually arrives in 5-9 business days.
