FAQ - Stage floor mics

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What is a stage-floor microphone?
It is a microphone placed on the floor of a theater stage, usually near the front edge, to pick up actors. It is also called an "area mic" because it picks up over a broad area.It's also called a "boundary microphone" because it rests on a boundary or surface: the stage floor.

Does the venue have an influence on feedback?
Yes. Our stage floor mics work great in theaters and auditoriums if the loudspeakers are placed close to the audience, Then feedback is not a problem. Some venues where feedback is likely to happen are:
(1) Small venues such as nursing homes, night clubs, and music stores. Floor mics are not recommended for those venues.
(2) Theaters with permanent loudspeakers that are close to or over the stage. They tend to cause feedback unless they are line arrays or column speakers. We recommend that you buy, borrow, or rent two portable PA speakers on stands, and place them close to the audience to prevent feedback.
(3) Very live, reverberant rooms such as gymnasiums with lots of hard surfaces. We recommend using stand-mounted column speakers such as the Soundtown CARPO-V5SD to focus sound on the audience, or floor-mounted column speakers aiming at the bleachers, such as the Bogen SCW35.

Do your mics require phantom power?

Yes, 12 to 48 volts. That is supplied by most mixers. The mic simply plugs into the mixer mic input to receive power. If your mixer does not have phantom power, you need to get a phantom power supply such as the ART Phantom I, Behringer PS400, or Rolls PB23. Plug the mic into the phantom supply, and connect the supply output to your mixer mic input.

How many mics do I need? Where should I place them?
20 ft stage: 1 mic center stage.
24-30 ft stage: 3 mics 12 to 15 feet apart.
35-40 ft stage: 3 mics 15 feet apart.
45-50 ft stage: 3 mics 17 feet apart.


Stage-floor mic placement on a stage


The FRONT of the mic is indicated by an arrow on the bottom of the mic. As you face the stage from the audience, the cable should exit to the left out of the mic. The long dimension of the mic should be parallel with the stage edge.

How do I get the mic signals to my mixer? The supplied mic cables don't reach to my mixer.
Purchase some microphone cables and plug them into the mic connectors. The mic cables should have a female XLR connector on one end and a male XLR on the other end.

Another option is a microphone snake. Some suppliers are whirlwind.com, hosatech.com, and procosound.com.

Do floor mics pick up a lot of footstep noise?
No, no more than your ears do. Stand close to the stage with the P.A. off. If you can hear footsteps when actors walk, any mic will "hear" them too. Have the actors wear rubber-soled shoes. Or carpet the stage floor and put the mic on an 18"- square, 1/8" thick masonite panel.

It helps to brace the stage from underneath so that it doesn't creak. You might apply some sound damping material such as Fatmat eXtreme at www.fatmat.com. Also, switch in a 100 Hz highpass filter (lowcut filter) on each mic channel , 200 Hz for children.

The floor mic is insensitive to floor vibrations. That's because the mic diaphragm is perpendicular to the stage floor. When the stage vibrates up and down, the mic diaphragm does not move and does not produce a signal. The mic still picks up percussive dance sounds which are in the air.

Can I reduce stage-floor thumps by putting the mic on a foam block or other padding?
No. In fact, if you lift the mic off the floor while it is picking up footsteps, you should hear no difference in the loudness of the footsteps.The Stage Floor Mic is not sensitive to floor vibrations. That's because the mic diaphragm is perpendicular to the stage floor, so it doesn't move in and out when the floor vibrates up and down.

Can you recommend a powered mixer for use with your floor mics?
One is the Peavey PVi 6500 for $399 from sweetwater.com. A complete sound system would be:

Floor mics > long mic cables > powered mixer > long speaker cables > speakers on stands (2 needed).

Compared to wireless mics, floor mics are much lower cost, virtually indestructible, and simple to use. No special skills needed.

How can I reduce feedback?
Click here for tips

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Can your mics be used for an "assisted listening" setup for our hard-of-hearing patrons? Yes.
Do not put each mic on a foam pad - that does not reduce footstep noise, and it reduces clarity of speech. Rubber-soled shoes or moccasin-type shoes reduce footstep noise.
  • I need to use the mic outdoors but I'm worried about wind noise. How can I shield the mics from wind?
    Get a 9"x12"" piece of black faux fur from Jo-Ann Fabric

    Cut out a few 6" x 7" pieces to cover the floor mics. Tape down the front and back of the fur piece. On your mixer, enable a 100 Hz highpass filter and you're all set. The effect on the mic's frequency response is -2 dB at 10 kHz, which is easy to equalize.

    Can I tape the mic to the stage floor?
    Yes, use gaffer's tape on the base plate. Do not cover the grille with tape.

  • Where should I place monitor speakers when using floor mics?
    First, do not feed the actors’ voices through the monitors because that will cause feedback. Use the monitors only for musical cues.

    Place the monitor speaker about 6 feet behind the microphones. Here’s why: If a monitor speaker is on stage, it will be close to a mic, so the mic will pick up a lot of the monitor's sound and relay it to the audience, making it difficult to hear the actors above the music.

    We want the actors to hear the monitor speaker, but we don't want the mic to pick up the monitor speaker. Our floor mics partly reject sound coming from behind them, so it makes sense to put the monitor speaker several feet behind the mics.

    As shown below, put the monitors on stands about 6 feet behind the microphones. The stands can be boxes or regular speaker stands. You can play music through the monitors to cue the actors.

    Monitor placement with stage floor mics

    A wedge-shaped monitor speaker is shown above. You might put a brick or a wood block under the far edge of the monitor to tilt it more toward the actors.

    If a few singers must hear themselves through the monitor speakers, those singers must use headworn or handheld mics. You can send their voices through the monitors without feedback. But do not send the floor mics through the monitors because they will feed back.

    Can I paint the microphone?
    Yes. Follow this procedure:

  1. Cover the grille holes with masking tape to keep paint off the foam windscreens.
  2. Spray paint the mic.
  3. When dry, remove the masking tape from the grille holes.
  4. Hand-paint the grill holes -- do not spray-paint.

    How are your mics tested?
    We 100% test our mics for frequency response, off-axis attenuation and sensitivity using Time Delay Spectrometry (TDS) and a TEF analyzer. With TDS or TEF measurements, a loudspeaker generates a frequency sweep from 20 Hz to 20 kHz. The microphone under test picks up that sweep. The mic's signal is run through a bandpass filter that tracks the sweep, and filters out sound reflections from the room because they are at a different frequency than the tracking filter. As a result, an anechoic measurement can be made in an ordinary room.

    Where do you sell your microphones?
    We sell directly from this web site to customers in the U.S. and around the globe. In the UK, we sell from our sole UK distributor, 10 Out of 10 Productions Ltd. If you live in the UK, please purchase our mics from them.

    Can you take purchase orders?
    Yes, from U.S. schools only. Schools should order directly from our website and mention "Purchase order" as the payment method.

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