U841A

Omnidirectional Condenser Boundary Microphone

MSRP* US$333.00
Two-Year 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


    The U841A delivers exceptionally intelligible audio reproduction in a super-compact, low-profile design. Equipped with UniGuard® RFI-shielding technology, this omnidirectional condenser boundary microphone is designed for clear, highly intelligible sound reinforcement, professional recording, television and conferencing in surface-mount applications. The U841A has a 360° pickup angle and operates on battery or phantom power.
  • Features


    • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording, television, conferencing and other demanding sound pickup situations

    • UniGuard® RFI-shielding technology offers outstanding rejection of radio frequency interference (RFI)

    • UniSteep® filter provides a steep low-frequency attenuation to improve sound pickup without affecting voice quality

    • Small-diameter UniPoint® capsule near boundary eliminates phase distortion and delivers clear, high-output performance

    • Heavy die-cast case and silicone foam bottom pad minimize coupling of surface vibration to the microphone

    • Low-profile design with low-reflectance black finish for minimum visibility

    • Operates on battery or phantom power

  • Specifications

    ELEMENTFixed-charge back plate permanently polarized condenser
    POLAR PATTERNOmnidirectional in hemisphere above mounting surface
    FREQUENCY RESPONSE30-20,000 Hz
    LOW FREQUENCY ROLL-OFF80 Hz, 18 dB/octave
    OPEN CIRCUIT SENSITIVITYPhantom: –39 dB (11.2 mV) re 1V at 1 Pa
    Battery: –40 dB (10.0 mV) re 1V at 1 Pa
    IMPEDANCEPhantom: 200 ohms
    Battery: 270 ohms
    MAXIMUM INPUT SOUND LEVELPhantom: 132 dB, 1 kHz at 1% T.H.D.
    Battery: 122 dB SPL, 1 kHz at 1% T.H.D.
    DYNAMIC RANGE (typical)Phantom: 111 dB, 1 kHz at Max SPL
    Battery: 101 dB, 1 kHz at Max SPL
    SIGNAL-TO-NOISE RATIO73 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)2.8 oz (78 g)
    WEIGHT (POWER MODULE)4.9 oz (139 g)
    DIMENSIONS (MICROPHONE)2.56" (65.0 mm) diameter,
    0.59" (15.1 mm) height
    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
    CABLE25.0' (7.6 m) long (permanently attached to microphone), 0.13" (3.2 mm) diameter, 2-conductor, shielded cable with TA3F-type connector
    ACCESSORIES FURNISHEDAT8531 power module; battery; soft protective pouch
    Click on the chart to view the larger image
    POLAR PATTERN
    POLAR PATTERN
    FREQUENCY RESPONSE
    FREQUENCY RESPONSE



    Conditions
  • Downloads

    UniPoint Review - Sound & Video Contractor (pdf 128.21 KB)
    UniPoint Review - Pro Audio Review (pdf 238.70 KB)
    U841A Specification Sheet (pdf 302.60 KB)
    U841A Submittal Sheet (pdf 482.19 KB)
    Optional Windscreens / Mounts
  • Reviews

  • Q & A

    Do you have questions about this product?

    Get answers from real customers and in-house experts with AnswerBox.

    9 Questions | 9 Answers
    Displaying questions 1-9
    • Q:

      Is there a adapter/devise for this Microphone where it can be mounted it to the ceiling?
      Asked on 8/20/2015 by Thinker from Pensacola, FL

      1 answer

      • Staff Reviewer

        A:

        Thank you for your inquiry.

        Please contact our Audio Solutions Department at (330) 686-2600 ext 5000 or at audio-solutions@atus.com for assistance with this.

        Answered on 8/25/2015 by AudioSolutionsSpecialist3
    • Q:

      Is the U841a sold as each or by the pair?
      Asked on 4/17/2015 by PVALarry from South Carolina, USA

      1 answer

      • A:

        Each.

        Answered on 4/20/2015 by AudioSolutionsSpec1 from Stow,OH
    • Q:

      Coverage Range of U841A

      hey Folks, as far as the specifications are concerned what is the estimated optimal coverage radius of the OMNIDIRECTIONAL CONDENSER BOUNDARY MICROPHONE U841A? Is it approved/recommended for a 15 foot radius? 25 foot radius? 5 foot radius?

      If you could provide its optimal coverage radius that would be great! Its intended use is in a video conferencing boardroom setting.

      Thanks!
      Asked on 4/9/2013 by marchmadness from Canada

      1 answer

      • A:

        Thank you for your inquiry. As in all things audio the answer to your question is "it depends". It depends on how loud your sound source is verses how loud the background noise is. It depends on how high you can set the gain on your audio system. It depends upon whether the microphone is used for sound reinforcement within the room where it is used or if it is used in video / audio conference or in a recording. Also, very importantly it greatly depends upon the acoustics of the room. All of these factors is one reason it can be a good idea to use an audio consultant or sound contractor when setting up a room and buying equipment.

        Answered on 4/15/2013 by AudioSolutionsManager from Stow, OH
    • Q:

      Is there an alternative microphone for U841A with mic on and off button? I am using this microphone for Cisco C40 codec.
      Asked on 2/4/2013 by Peng

      1 answer

      • A:

        Thank you for your inquiry. We have the U891RCx that has a switch, although it has a cardioid element. If you need an omni microphone, you can purchase the UE-O element speparately and replace the element in the mic.

        Answered on 2/15/2013 by AudioSolutionsManager from Stow, OH
    • Q:

      need to connect u841a to mixer desk

      We need to connect u841a to mixer desk, with xlr inputs: what do we need to do this?
      Asked on 8/15/2012 by peterfw

      1 answer

      • A:

        Thank you for your inquiry. You will need a standard XLRF to XLRM microphone cable. The power module has an XLR male connector. Please note if your mixer provides phantom power, the microphone will use it. If not it will use the on board batery.

        Answered on 8/27/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      U841A broken down

      Hi

      After trying out connecting U841A directly to a sound interface with phantom power i seems like it's broken down. Is there some fragile electronic in the microphone? Is it possible to repair it?
      Hop you can helpt me.

      Regards Mattias
      Asked on 4/23/2012 by mattias from denmark

      1 answer

      • A:

        Thank you for your inquiry. Please contact our Audio Solutions Team at 330-686-2600 ext 5000 and they will be be happy to help you trouble shoot this issue.

        Answered on 4/30/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      Low signal in

      Having to max. out my "mic" setting on PC. Still minimally functional.

      U841A microphone to AT8531 Power Module (with new battery). XLR to 3.5mm cable (mono) to PC "mic" input.

      Is this the best I can get??? Do I need something else?
      Asked on 2/29/2012 by topgun from Houston, TX, USA

      1 answer

      • A:

        Thank you foryour inquiry. If you are using a Windows system, make sure that you have turned up the volume of the input in your control panel for the recording device. Also, make sure the input is a mic level input and not a line level input. Please note that Mac laptops only have a line level input.

        Answered on 3/5/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      Wireless compatibility?

      Could a U841a be interfaced with an ATW-T310b to run wireless.
      Asked on 1/13/2012 by TastyJay from Omaha NE

      1 answer

      • A:

        Thank you for your inquiry. This microphone is not designed for wireless applications.

        Answered on 1/15/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      low signik on U841a

      Hi
      I have just received my new u841a boundary mic. When I connect it to my t.c. electronics desktop konnekt 6 firewire sound interface, i have to turn the gain in max on the interface to have a ok soon level. Is the u841a with a special low output signal? I have a new battery in the phantom power box. Can anyone help me?

      Mattias
      Asked on 12/26/2011 by mattias from denmark

      1 answer

      • A:

        Thank you for your inquiry. Make sure this is connected to mic input and not a line level input.

        Answered on 12/29/2011 by AudioSolutionsManager from Stow, OH
    Displaying questions 1-9

    Do you have a question about this product?