Audio-Technica AT831 Cardioid Condenser Lavalier Microphone
- Cardioid condenser lavalier for voice and acoustic guitar
- 120° acceptance angle reduces pickup from the sides and rear
- Battery/phantom, phantom-only, or unterminated versions
From $119.00 USD
Audio-Technica AT831 Cardioid Condenser Lavalier Microphone
On a lapel or an acoustic guitar, the Audio-Technica AT831 is a cardioid condenser lavalier that gives crisp, full-sounding pickup and high gain before feedback while suppressing background noise.
Its cardioid pattern takes in sound across a 120° angle and reduces pickup from the sides and rear, which helps isolate the voice or instrument you want.
It comes in three versions. The AT831b has a 1.8 m (6 ft) cable to the AT8531 power module, which runs on 11 to 52 V phantom power or one AA battery (not included). The AT831R has a 4.0 m (13.1 ft) cable to the AT8538 module, which runs on phantom power only. Each module has a 3-pin XLR output and a switch for an 80 Hz high-pass filter. The AT831c is the unterminated version of the AT831cW wireless model, with a 1.4 m (55 inches) cable and no power module. The AT831b and AT831R include the AT8444 instrument adapter for mounting the mic on an acoustic guitar.
The filter’s roll-off position reduces popping in close vocal use, low-frequency ambient noise such as traffic and air handling, room reverberation, and mechanically coupled vibration. Worn as a lavalier, it sits best about six inches below the chin.
Features
- Cardioid condenser lavalier for voice and acoustic instruments
- Crisp, full-sounding voice pickup
- 120° acceptance angle reduces pickup from the sides and rear
- Switchable 80 Hz high-pass filter on the AT831b and AT831R
- AT8444 instrument adapter included with the AT831b and AT831R
Available Options
| Termination | Model | Power Module | Cable Length |
|---|---|---|---|
| XLR Battery/Phantom Power Module | AT831b | AT8531 | 1.8 m (6 ft) |
| Unterminated | AT831c | None | 1.4 m (55 inches) |
| XLR Phantom-Only Power Module | AT831R | AT8538 | 4.0 m (13.1 ft) |
What's Included
- AT8531 power module (AT831b)
- AT8538 power module (AT831R)
- Clothing clip (AT8419 with the AT831b and AT831R)
- Windscreen (AT8116 with the AT831b and AT831R)
- AT8444 instrument adapter (AT831b and AT831R)
- Protective carrying case (AT831b and AT831R)
Specifications
| Element | Fixed-charge back plate, permanently polarized condenser |
|---|---|
| Polar Pattern | Cardioid |
| Frequency Response | 40 – 16,000 Hz |
| Low-Frequency Roll-Off | 80 Hz, 18 dB/octave |
| Open-Circuit Sensitivity | AT831b, phantom: −44 dB (6.3 mV) re 1 V at 1 Pa AT831b, battery: −46 dB (5.0 mV) re 1 V at 1 Pa AT831R: −42 dB (7.9 mV) re 1 V at 1 Pa |
| Impedance | AT831b, phantom: 200 ohms AT831b, battery: 270 ohms AT831R: 250 ohms |
| Maximum Input Sound Level | AT831b, phantom: 135 dB SPL, 1 kHz at 1% T.H.D. AT831b, battery: 121 dB SPL, 1 kHz at 1% T.H.D. AT831R: 141 dB SPL, 1 kHz at 1% T.H.D. |
| Dynamic Range | AT831b, phantom: 106 dB, 1 kHz at Max SPL AT831b, battery: 92 dB, 1 kHz at Max SPL AT831R: 112 dB, 1 kHz at Max SPL |
| Signal-to-Noise Ratio | 65 dB, 1 kHz at 1 Pa |
| Phantom Power | 11 – 52 V DC, 2 mA typical |
| Battery | AT831b: 1.5 V AA/UM3; 0.4 mA, 1,200 hours typical (alkaline) |
| Switches | AT831b: Off, on-flat, on-roll-off AT831R: Flat, roll-off |
| Output Connector | Integral 3-pin XLRM-type (power module) |
| Cable | AT831b: 1.8 m (6 ft), permanently attached, 2.6 mm (0.10 in) diameter, 2-conductor shielded, TA3F-type connector AT831R: 4.0 m (13.1 ft), permanently attached, TA3F-type connector AT831c: 1.4 m (55 inches), unterminated |
| Dimensions | Microphone: 25.0 mm (0.98 in) long, 10.2 mm (0.40 in) diameter AT8531 power module: 84.0 mm (3.31 in) H × 63.0 mm (2.48 in) W × 22.0 mm (0.87 in) D AT8538 power module: 92.9 mm (3.66 in) long, 18.9 mm (0.74 in) diameter |
| Weight | Microphone: 2.8 g (0.1 oz) AT8531 power module: 139 g (4.9 oz) AT8538 power module: 81 g (2.9 oz) |
