Omnidirectional Condenser Boundary Microphone

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  • Omnidirectional Condenser Microphone
  • Omnidirectional Microphones

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

  • Overview

    The new Engineered Sound. Contractor-exclusive innovations for every acoustical challenge. And safe haven from Radio Frequency Interference (RFI).

    This low-profile omnidirectional condenser boundary microphone is designed for clear, highly intelligible sound reinforcement, professional recording and teleconferencing in table-, ceiling-, or panel-mount applications. The microphone is equipped with a self-contained power module with an XLRM-type output connector, eliminating the need for an external power module. The microphone offers unsurpassed immunity from radio frequency interference thanks to Audio-Technica’s UniGuard® innovations. Protected by a rugged all-metal case with a two-layer steel mesh grille, the microphone has a 360° pickup angle, and is available in two colors: black (ES945) and white (ES945W).
  • Features

    • Designed for surface-mount applications such as high-quality sound reinforcement, professional recording and teleconferencing

    • Low-profile element provides uniform omnidirectional polar pattern with 360º acceptance angle

    • Mounts unobtrusively in table-tops, ceilings and wall panels

    • Self-contained power module with XLRM-type output connector

    • Rugged all-metal case with a two-layer steel mesh grille

    • Isolators provide mechanical dampening of mounting-surface vibration

    • Requires 11V to 52V DC phantom power

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

    • Available in two colors: black (ES945) and white (ES945W)

    • RoHS compliant—free from all substances specified in the EU directive on hazardous substances
  • Specifications

    ELEMENTFixed-charge back plate, permanently polarized condenser
    POLAR PATTERNOmnidirectional
    OPEN CIRCUIT SENSITIVITY-42 dB (7.9 mV) re 1V at 1 Pa
    IMPEDANCE200 ohms
    DYNAMIC RANGE (typical)112 dB, 1 kHz at Max SPL
    SIGNAL-TO-NOISE RATIO64 dB, 1 kHz at 1 Pa
    WEIGHT63 g (2.2 oz)
    DIMENSIONS69.0 mm (2.72") long,
    28.0 mm (1.10") diameter
    OUTPUT CONNECTORIntegral 3-pin XLRM-type
    ACCESSORY FURNISHEDOne pair isolators
    Click on the chart to view the larger image

  • Downloads

    ES945 / ES945W Specification Sheet (pdf 108.95 KB)
    ES945 & ES945W Submittal Sheet (pdf 386.46 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.

    11 Questions | 11 Answers
    Displaying questions 1-10Previous | Next »
    • Q:

      ES945 / LED microphone omnidirectional

      I have a few questions regarding this microphone, in the process of designing a new integrated conference room AV
      System. Looking for professional sound voice pickup.

      Would the ES945 omni-directional pickup pattern be optimal for this table layout (4.5' feet wide x 13' feet long, 14 seated chairs)
      I was thinking of deploying a total of 6 individual ES945 microphones, permanently installed down the middle - center of a wood table.
      Each seated participant at every 2 chairs, would have 1 mic in front of them at about 2.25' feet away ( 27" inches to edge of table).

      Do you think this range is too far for voice pickup? I do not want to rely heavily on the DSP programming for increasing gain.

      Verify if wired to a Biamp DSP, they are fully compliant?
      Logic to include: Crestron mute, individual mic voice gain increase / decrease, visual indicator lit on microphone if pressed

      Omnidirectional Condenser Boundary Microphone with Mute Switch and LED Indicator

      Thank You
      Asked on 5/12/2015 by Chris88 from Toronto

      1 answer

      • A:

        The ES945/LED will not provide a logic in/out for the Biamp DSP. To achieve remote capabilities over Logic, you would use the AT8657/LED Socket and add the ES945 (non-LED version of the mic) to it as the microphone element.
        Will these microphones be used only for conferencing? Will you be trying to provide voice lift / sound reinforcement in the local room?
        Six omnidirectional microphones within a 13 foot span is too many microphones. You would have some phase issues. if a person is to be seated at each end of the table, we recommend placing a mic 2.5 feet from each end, then placing a third mic in the center of the table which will be 4 feet from either mic.

        Answered on 5/13/2015 by AudioSolutionsSpec1 from Stow,OH
    • Q:

      Room size and coverage question

      I have a 30' x 30' classroom with 9 foot drop-tile ceilings. Participants will be seated. How many microphones would I need to cover the entire room? And which would work better -- the omni or cardioid model? Thanks for your help!
      Asked on 1/29/2014 by mpwillis from Dubuque, IA, USA

      1 answer

      • A:

        Please contact the Audio-Technica Audio Solutions Team with your inquiry. You may email them at, or you may call them at 330-686-2600.


        Answered on 1/31/2014 by AudioSolutionsSpec2 from Stow, OH
    • Q:

      Designing a video conference room with boundry mic(s) in the ceiling

      The video display will be wall mounted with sound reinforcement speakers on each side. How do I determine proper microphone coverage and will the sound reinforcement be a problem.
      Asked on 2/24/2013 by Vincent from Fresno, CA, USA

      1 answer

      • A:

        Thank you for your inquiry. Folks seated at a table will be at least 4.5 feet away from a mic (with 9 foot ceilings). The mics will pick up the voices, but will also pick up a lot of the room and sound somewhat “distant”. This may be ok with for your application, but I’m afraid you may not be too happy with the sound. These work much better when mounted in the table top. Another option is hanging microphones such as our U853R becuase you can hang them closer those speaking.

        Answered on 2/27/2013 by AudioSolutionsManager from Stow, OH
    • Q:

      using multiple ES945 mics

      Hi - is it possible to 'daisy chain' 2 or 3 ES945 mics or does each mic have to be routed through a mixer
      many thanks
      Asked on 2/5/2013 by bobidge from England, UK

      1 answer

      • A:

        Thank you for your inquiry. It is best to home run each mic to its own channel for several reasons. First, you can control and EQ each on their own. Secondly, when you "Y" two mics together you change the impendence of the mics which will alter their performance, mostly in volume. Thirdly, depending upon the phantom power supply on the mixer you could put a strain on its limits and also affect the performance of the mic. It may very well work "ying" them together, but it is not optimal.

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

      Do you have an AutoCad drawing

      Do you have an AutoCad drawing for the ES945 microphone. I doing an installation diagram for one of our jobe where we are using about 66 of these microphones.
      Asked on 12/17/2012 by GordonS from Sunnyvale, CA, USA

      1 answer

      • A:

        Thank you for your inquiry. Please contact our Audio Solutions Team at 330-686-2600 ext 5000. They will help with this.

        Answered on 12/24/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      Can this be plugged in a video camcorder?
      Asked on 11/30/2012 by Tracyweber

      1 answer

      • A:

        If your camera has a 3.5mm TRS (Stereo) microphone input, then you will NEED the following:
        1. AT8801 Phantom Power Supply
        2. XLR-F to 3.5mm TRS adapter cable.

        If your camera has an XLR connection that supplies phantom power, then all you might need is an XLR cable. If your camera has an XLR input but no phantom power, you will need an extra XLR cable and an AT8801 Phantom Power Supply.

        If you choose not to use the above components, there is a high chance that this ES945 (condenser microphone) will NOT work.

        Answered on 11/30/2012 by AudioSolutionsSpec2 from Stow, OH
    • Q:

      Ceiling Mount for Conference Table

      I need a solution to enable video conferencing for a rectangular table with 14 seated participants. Has to be cieling mounted, 8' high, due to wiring separation issues. Is the distance from cieling to speakers too far; between 5' and 10' if I use 2 mics? I want to be sure before purchasing whether this is the right product or is there a better model?
      Asked on 11/14/2012 by snuss from Beale AFB, CA, USA

      1 answer

      • A:

        This is a very common request but almost always results in a poor experience. First, 10' is way too far for this microphone and 5' is pushing it. Also, you want to avoid multiple microphones that cover the same area as this results in comb filtering which will make the audio sound even more distant and hollow. You need a balance between room acoustics and the microphone placement and selection. Because the distance between the source (person speaking) and the mic is so far in a ceiling application room acoustics are critical (try for an RT60 time of .5s or less). Speaking of critical... the critical distance will help you determine the useful distance of a mic. Personally, I would recommend you either use microphones which can hang down from the ceiling or you use directional microphones each focused at a specific area and avoid overlap. Check out the 3:1 rule for microphones for additional info. AT makes great mics but I'd have to recommend the Audix M40 for a ceiling-mounted application. You'll need an audio DSP with AEC and adaptive auto-mixing as well. If the performance of the room is important then I would recommend contracting an AV systems integrator or AV/acoustics consultant handle the planning.

        Answered on 11/26/2012 by BennAV from VA
    • Q:

      What is the pick-up of this microphone?

      We have conference room, and we're designing a conference table where mic is embedded to it. What is the ideal distance of each mic and the distance from the users?
      Asked on 4/1/2012 by cdabanes

      1 answer

      • A:

        Thank you for your inquiry. This depends on several factors. If this is just for audio/video conferencing use with no reinforcement in the room, generally a microphone placed 18 to 24 inches from the edge of the table will pick up 2 to 3 people in a row very well.

        Answered on 4/5/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      what you mean by phantom power?

      it's written in the specification that it is 3 pin connector.
      2 pin are differential signal ouptut, tird one is the ground.
      then is there any battery inside? or another power plug that I dont see?
      Asked on 1/31/2012 by Hitheck from Canada

      1 answer

      • A:

        Phantom power is DC voltage sent down the microphone cable to power the preamplifier of a condenser mic capsule - sometimes through a power module. The power module attached to the mic unit converts the 9 - 52VDC into a small bias voltage that the mic capsule’s FET needs for the microphone to operate.

        A balanced mic cable has three conductors; Pin 1 is ground, Pin 2 is audio positive, and Pin 3 is audio negative. Most microphones produce a positive voltage on Pin 2 when sound pressure is applied to the diaphragm.

        Phantom power is 9 - 52VDC applied across Pin 1 and Pin 2 - and at the same time applied across Pin 1 and Pin 3. The term 'phantom power' was assigned because if you take a measurement across the two audio lines - Pin 2 and Pin 3 - you find 0 Volts DC. The voltage does not affect the mic signal.

        Answered on 2/6/2012 by AudioSolutionsManager from Stow, OH
    • Q:

      How can I determine quantity required per room size?

      I have a coverage area of 80' x 50', how many ceiling microphones will be required?
      Asked on 12/7/2011 by platotrek from arizona

      1 answer

      • A:

        Thank you for your inquiry. You did not mention the height of the ceiling and if the participants would be seated or standing. I will assume a ceiling of 8 feet and participants seated. If this is the case, placing the microphones 10.3 feet apart from each other should be sufficient.

        Answered on 12/8/2011 by AudioSolutionsManager from Stow, OH
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