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B3 Omnidirectional Lavalier

Exceptional audio quality, low handling noise, extreme water-resistance, and unreasonable durability.


Our B3 is essential to any well-stocked pro audio toolkit: it captures the highest-quality audio available in a lavalier mic, with field-selectable high-frequency response caps and extremely low handling noise. Whether you need a tie-clip lavalier for an interview, a hair-hidden mic for drama, a water-resistant mic for water sports or hurricane reporting, or simply a small mic to hide in a prop flower vase, you'll never run out of applications for Countryman's B3 lavalier.


The B3 Lavalier is supplied with:

  • Carrying case
  • Black and white cable clips
  • Windscreen
  • Protective caps (+0, +4, and +8 dB)

High overload

At sound pressure levels approaching the pain threshold, our mics still won't distort. That's why they're favorites for rock bands and opera singers alike.

Rugged cable

Aramid strength members and engineered alloys ensure that our cables provide extreme tensile and flex strength.

True colors

Our colors are precision-matched to theatre makeup shades to blend with a wide range of skin tones and clothing.

Water resistance

Our mics are water-sealed so you can use them in the hair or against the skin under hot theater lights without "sweat-outs".

Frequency Response: 20 Hz to 20 kHz
Equivalent Acoustic Noise: 24 dBA
Dimensions: 0.23" x 0.18" (5.8mm x 4.6mm)
Weight: 0.012 oz (0.34 g)
Power Requirements:

Wireless: 3V to 12V at 200 uA

Phantom: 9V to 48V (4mA at 48V)


W4 (no band): 12.0 mV/Pascal

W5 (red band): 4.0 mV/Pascal

Overload Sound Pressure Level:

Wireless: 140 dBA SPL (5V, red band)

Phantom: 150 dBA SPL (48V, red band)

Cable Length:

5 Feet

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B3 Omnidirectional Lavalier

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Product Options


Choose the device which will connect to your microphone.

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Brand is the manufacturer of the wireless transmitter or digital recorder which will be used with the microphone. Choose "Hardwired" for a phantom powered XLR3 connection.

Model is the model number of the transmitter pack or digital recorder.

For digital recorders only choose how you would like the mono microphone signal routed:

"Audio on Left Channel" to route the mono microphone signal to the recorder’s left channel.

"Audio on Left and Right Channels" to route the mono microphone signal to the recorder’s left and right channels.


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Countryman products come in a variety of colors to blend in with their surroundings:

Tan works perfectly for average Caucasian skin tones, as well as olive complexions and is a common earset choice.

Light beige works well in theatrical applications due to its slightly pink undertone, which is also appropriate for extremely fair skin.

Cocoa is the ideal choice for African American skin tones ranging from very light to chocolate.

Black is appropriate for extremely dark skin or for situations where you want the mic to be visible.

White is a versatile choice for light-colored clothing. The white protective caps available for our lavaliers can be colored with felt pens for a custom match to clothing.

For placement against skin, when in doubt, choose the darker option. That’s because a mic that’s too light can resemble a scar or blemish, while a mic that’s slightly darker than the background tends to blend much better and draws less attention.


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The more sensitive a microphone is to soft sounds, the earlier it will overload at loud sounds. We provide sensitivity options based on the intended use, from general speaking to powerful vocals or instruments. "W" sensitivities are for wireless systems; "P" sensitivities are for hardwired systems.

E6 Earset: or H6 Headset For standard spoken word applications, choose the W5. For musical theater, or dynamic presenters, choose the W6. For opera singers, or other extremely loud applications only, choose the W7.

E2 Earset: The standard gain (W5, no colored band) is for almost all applications, including vocals and speaking. The lower gain (W6, blue band) is for powerful vocals requiring the highest overload.

Lavaliers: Choose W4 for standard chest-worn applications, W5 for head miking in a theatre, and W6 for head miking with very powerful vocals--for example, head miking an opera singer--or positioning near the mouth.

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