AT831b

Cardioid Condenser Lavalier Microphone

MSRP* US$279.00
Limited End-user Warranty

*Manufacturer's Suggested Retail Price. Actual selling price may vary; please check with an authorized Audio-Technica dealer.



  • Overview
  • Features
  • Specifications
  • Downloads
  • Reviews
  • Q & A

  • Overview


    This clip-on lavalier mic provides crisp, full-sounding voice pickup and excels as an instrument mic, especially for pickup of acoustic guitar with included AT8444 guitar adapter. It offers excellent gain before feedback and suppression of background noise. An integral 80 Hz high-pass filter provides easy switching from a flat frequency response to a low-end roll-off. It operates on battery or phantom power.

  • Features


    • Clip-on lavalier mic also excels in acoustic guitar applications

    • Provides crisp, full-sounding voice and instrument pickup

    • Operates on battery or phantom power

    • 6' (1.8 m) cable permanently attached to mic, TA3F connector at power module

    • Also available as:
      AT831R Ė with phantom-only power module
      AT831c Ė less power module; includes clothing clip and windscreen only; 10' (3 m) cable, unterminated
      AT831cW Ė less power module; includes clothing clip and windscreen only; 55" (1.4 m) cable terminated with locking 4-pin connector for A-T UniPakģ wireless systems
      AT831cT5 Ė less power module; includes clothing clip and windscreen only; 55" (1.4 m) cable terminated with TA5F connector

  • Specifications

    ELEMENTFixed-charge back plate, permanently polarized condenser
    POLAR PATTERNCardioid
    FREQUENCY RESPONSE40-18,000 Hz
    LOW FREQUENCY ROLL-OFF80 Hz, 18 dB/octave
    OPEN CIRCUIT SENSITIVITYPhantom: -44 dB (6.3 mV) re 1V at 1 Pa
    Battery: -46 dB (5.0 mV) re 1V at 1 Pa
    IMPEDANCEPhantom: 200 ohms
    Battery: 270 ohms
    MAXIMUM INPUT SOUND LEVELPhantom: 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 RATIO65 dB, 1 kHz at 1 Pa
    PHANTOM POWER REQUIREMENTS11-52V DC, 2 mA typical
    BATTERY TYPE1.5V AA/UM3
    BATTERY CURRENT / LIFE0.4 mA / 1200 hours typical (alkaline)
    SWITCHOff, 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
    CABLE6' (1.8 m) long (permanently attached to microphone), 0.10" (2.6 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
    ACCESSORIES FURNISHEDClothing clip; AT8444 instrument adapter; AT8531 power module; AT8116 windscreen; battery; protective carrying case
    AUDIO-TECHNICA CASE STYLEM1
    Click on the chart to view the larger image
    POLAR PATTERN
    POLAR PATTERN
    FREQUENCY RESPONSE
    FREQUENCY RESPONSE



    Conditions
  • Downloads

    AT831b Specification Sheet (pdf 99.14 KB)
    AT831b Submittal Sheet (pdf 369.15 KB)
    Optional Windscreens / Mounts
  • Reviews

    AT831b Cardioid Condenser Lavalier Microphone 4 5 2 2
    This product has great features Pros: veil-free sound, good space imaging Cons: slight high-pitched voice absence and few glitter. Good value for money. November 2, 2011
    Good microphone but could use more mounting options I bought this microphone to use on acoustic guitar. The included sound hole mount works and the adjustment allows for some limited tonal adjustments. Audio-Technica should consider offering additional instrument mounts for this quality microphone such as the 4099G mount offered by DPA that positions the microphone over the fretboard of the guitar for more natural sound. I prototyped an alternative such mount and the results are encouraging. October 24, 2011
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  • Q & A

    (9 Questions : 9 Answers)

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    1 answer

    how to connect this to labtop

    how can I connect this AT831b Cardioid Condenser Lavalier Microphone

    to my macbook for voice recording. Will the Griffin Technology iMic Audio USB Interface work? Or do I need something else?

    Sincerely,
    2 years, 2 months ago
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    Answer: 
    Thank you for your inquiry. Yes, you would need some type of audio interface. I believe the iMic will work, although you will need an XLR female to 3.5m male adapter cable
    Age: 45-54
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    2 years, 2 months ago
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    Stow, OH
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    Will the Shure X2u XLR-to-USB Microphone Adapter work with the AT831b Cardioid Condenser Lavalier Microphone?
    2 years, 2 months ago
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    Answer: 
    Thank you fro your inquiry. We have not tested this, but I see no reason why it would not.
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    2 years, 2 months ago
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    Stow, OH
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    1 answer

    What are the Power Switch Positions?

    With out a manual I'm not sure what the power switch settings are. I'm assuming one is for battery and the other phantom power.

    I'm also missing a screw that holds the clip on for the battery pack. Does anyone know where I can obtain a replacement?

    Thanks!
    ~Paul
    Age: 55-65
    User Type: Studio
    Experience: Amateur
     
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    2 years, 1 month ago
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    Anonymous
    NY
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    Answer: 
    Thank you for your inquiry. The switch positions are Off, Bass roll off (bent line) and no roll off (straight line). The below link will take you to the spec sheet for this microphone.

    http://www.audio-technica.com/cms/r...

    Contact our parts department at 330-686-2600 option 4 and they can help with the missing screw.
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    2 years, 1 month ago
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    Stow, OH
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    This preamp has an RCA jack for plugging in a mic, or other pickup. Can an RCA plug replace the existing plug on the mic cable, can the cable be shortened?

    Thanks
    Age: Over 65
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    Experience: Amateur
    2 years ago
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    Mt Morris, IL 61054, USA
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    Answer: 
    Thank you for your inquiry. This probably will not work correctly. Most (all that I know of) RCA connectors are connectors are line level, unbalanced and high impedance. The output of the microphone is mic level, balanced and low impedance. If you get any sound it will probably be very low in volume and noisy.
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    1 year, 11 months ago
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    Stow, OH
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    We use this for Society meetings of about 100 people in a hall and through a Bose L1 Compact system. We get occasional and intermittent feedback which usually drops off but repeats randomly. It is not discerned by most of the audience but I would like to eradicate this problem. Do you have any suggestions?
    Age: 55-65
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    1 year, 8 months ago
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    United Kingdom
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    Answer: 
    Thank you for your inquiry. Feedback occurs when the amplified sound from any loudspeaker reenters the sound system through a microphone and is amplified again and again, causing a loop. To avoid or lessen the likelihood of feedback, try some of these steps:

    - Keep the microphone behind the loudspeakers to minimize the sound that can reenter the microphone. If the microphone is in front of the speakers, then feedback is nearly guaranteed.

    - Your microphone has a unidirectional (cardioid) polar pattern. A cardioid microphone has its maximum rejection at the rear of the mic. Keep monitors or loudspeakers in this area of maximum rejection.

    - Place the microphone close to the sound source. When you reduce the distance between the sound source and the microphone by half, you double the sound pressure level at the microphone. This increases your gain before feedback (i.e., it allows your sound system to produce more SPL before reaching a level that would induce feedback).

    - Use an equalizer or feedback eliminator to dampen the frequencies where feedback is occuring.
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    1 year, 8 months ago
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