Description
The AT831b is a miniature clip-on/lavalier condenser microphone with a cardioid polar pattern. It is designed for quality sound reinforcement, professional recording, television and other demanding sound pickup applications. The microphone is intended to be worn on the clothing or used as an instrument mic for excellent yet unobtrusive sound pickup. The wide-range capability of the microphone ensures clean, accurate reproduction with high intelligibility for speakers and presenters as well as for instrument pickup. Its small size makes it ideal for use in applications where minimum visibility is required.
The microphone requires 11V to 52V phantom power or a 1.5V AA battery for operation. A battery need not be in place for phantom power operation. The microphone’s cardioid polar pattern provides a 120° angle of acceptance. The microphone includes a 1.8 m (6') permanently attached miniature cable. Its free end connects to the provided AT8531 power module via a TA3F-type connector. The output of the power module is a 3-pin XLRM-type connector.
A 3-position switch in the power module permits choice of off, on/flat response or on/low-roll-off (via integral 80 Hz high-pass UniSteep® filter). The roll-off position reduces the pickup of low-frequency ambient noise. The microphone comes equipped with a power module, a clothing clip, an instrument adapter, a windscreen, a battery and a protective carrying case.
Features
- Clip-on lavalier mic provides crisp, full-sounding voice pickup
- Also excels as an instrument mic, especially for pickup of acoustic guitar with included A T8444 instrument adapter
- Excellent gain before feedback and suppression of background noise
- Cardioid polar pattern reduces pickup of sounds from the sides and rear, improving isolation of desired sound source
- Offers the convenience of battery or phantom power operation
- Rugged design and construction for reliable performance
- UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality
Accessories Furnished
Clothing clip; AT8444 instrument adapter; AT8531 power module; AT8116 windscreen; battery; protective carrying case
Specifications
POLAR PATTERN Cardioid
FREQUENCY RESPONSE 40-18,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 18 dB/octave
OPEN CIRCUIT SENSITIVITY
- Phantom: -44 dB (6.3 mV) re 1V at 1 Pa
- Battery: -46 dB (5.0 mV) re 1V at 1 Pa
IMPEDANCE
- Phantom: 200 ohms
- Battery: 270 ohms
MAXIMUM INPUT SOUND LEVEL
- Phantom: 135 dB SPL, 1 kHz at 1% T.H.D.
- Battery: 121 dB SPL, 1 kHz at 1% T.H.D.
DYNAMIC RANGE (typical)
- Phantom: 106 dB, 1 kHz at Max SPL
- Battery: 92 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO 65 dB, 1 kHz at 1 Pa
PHANTOM POWER REQUIREMENTS 11-52V DC, 2 mA typical
BATTERY TYPE 1.5V AA/UM3
BATTERY CURRENT / LIFE 0.4 mA / 1200 hours typical (alkaline)
SWITCH Off, on-flat, on-roll-off
WEIGHT (MICROPHONE) 0.1 oz (2.8 g)
WEIGHT (POWER MODULE) 4.9 oz (139 g)
DIMENSIONS (MICROPHONE) 0.98" (25.0 mm) long, 0.40" (10.2 mm) diameter
DIMENSIONS (POWER MODULE) 3.31" (84.0 mm) H x 2.48" (63.0 mm) W x 0.87" (22.0 mm) D
OUTPUT CONNECTOR (POWER MODULE) Integral 3-pin XLRM-type
CABLE 6' (1.8 m) long (permanently attached to microphone), 0.10" (2.6 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
AUDIO-TECHNICA CASE STYLE M1
