Description
The AT831R is a miniature condenser microphone with a cardioid polar pattern. It has been designed for hands-free applications in sound reinforcement systems and for use by professional musicians, especially for pickup of acoustic guitar. The AT831R provides improved gain before feedback that normally cannot be achieved with miniature omnidirectional microphones. Close up voice and instrument pickup are crisp and clean, yet full sounding, while suppression of background noise is significantly improved over that of stand mounted full size cardioid microphones.
Features
- Clip-on lavalier mic also excels in acoustic guitar applications
- Provides crisp, full-sounding voice and instrument pickup
- Operates on phantom power only
- 6′ (1.8 m) cable permanently attached to mic, TA3F connector at power module
- Included AT8417 clothing clip; AT8444 Instrument Microphone Adapter; AT8538 remote power module; AT8116 windscreen; protective carrying case
- Also available as: AT831b – with battery or power module AT831c – less power module; includes clothing clip and windscreen only; 10′ (3 m) cable, unterminated AT831cW – less power module; includes clothing clip and windscreen only; 55″ (1.4 m) cable terminated with locking 4-pin connector for A-T UniPak® wireless systems
Specs
| Element | Condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 40 – 16,000 Hz |
| Open Circuit Sensitivity | -42 dB (7.9 mV) re 1V at 1 Pa |
| Impedance | 250 Ω |
| Maximum Input Sound Level | 141 dB SPL, 1 kHz at 1% T.H.D. |
| Low Frequency Roll Off | 80 Hz, 18 dB/octave |
| Switches | Off, on-flat, on-roll-off |
| Dynamic Range | 112 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 |
| Weight | Microphone : 2.8 g (0.1 oz) – Power Module : 81 g (2.9 oz) |
| Dimensions | Microphone: 25.0 mm (0.98″) long, 10.2 mm (0.40″) diameter – Power Module: 3.66″ (92.9 mm) long, 0.74″ (18.9 mm) diameter |
| Output Connector | Integral 3-pin XLRM-type (on Power Module) |
| Accessories Included | AT8417 clothing clip; AT8444 Instrument Microphone Adapter; AT8538 remote power module; AT8116 windscreen; protective carrying case |


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