IMB30 & IMBL30

Boundary Installation Microphones

Boundary microphones designed for permanent installation in ceilings and tabletops for conferencing and other speech applications

  • True Semisphereâ„¢ polar pattern

  • Low profile design

  • Available in black, white or stainless finish

  • Available with LumiCommâ„¢ Touch Ring

From $699

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Description

The Earthworks IMB Series boundary microphones are designed for permanent installation in ceilings and tabletops for conferencing and other speech applications.

Performance

When capturing every word is critical, the IMB boundary microphones are the most reliable omnidirectional miking solution. Optimized for speech, the IMB microphones feature a flat frequency response out to 30kHz that delivers the highest level of speech intelligibility and articulation. This means less straining to understand the words being spoken due to poor audio quality, so more time can be spent understanding the message being transmitted.

The IMB microphone always reproduces the speaker’s voice with incredible clarity and intelligibility due to the near-perfect polar pattern across all frequencies. This wider coverage also means that fewer Earthworks microphones are required to properly cover a conference room, cutting down on the number of channels of DSP, cables and other ancillary equipment required for the system. Compatible with all DSP systems that provide 24-48V phantom power, the IMB microphones can easily integrate into existing system designs or new installations.

Incorporating a unique filter that significantly reduces low frequency table thumping, HVAC noise and paper shuffling, the IMB microphones do not exhibit the problems common with conventional boundary microphones.

The dual-color LumiComm™ light ring and touch sensor output found in the IMBL30 models allows integrators to program the microphone’s function and LED color, such as assigning a red LED color for the microphone being muted.

Construction

Designed with aesthetics in mind, the IMB microphones provide a discrete miking solution thanks to their diminutive size. The IMB30 microphone flange measures just over 1.4 inches (36.5mm) wide and 0.125 inches (3.2mm) tall. The IMBL30 LumiCommâ„¢ model flange measures just under 1.6 inches (40.5mm) wide and 0.35 inches (8.8mm) tall, mounting flush into the tabletop or ceiling for a low profile appearance.

Options

The IMB microphones are available with or without the LumiCommâ„¢ Touch Ring. Black, white and stainless finishes are available.

  • Only 1.4375 inch (3.6cm) in diameter
  • Available in black, white or stainless finish
  • True Semisphereâ„¢ polar pattern
  • 30kHz flat frequency response
  • More gain before feedback
  • Near perfect polar pattern
  • Primary applications include teleconferencing, distance learning, surveillance, boardrooms, government facilities, and ambient room miking
Frequency Response: 60Hz to 30kHz ±2dB at 45 degrees incidence to the surface

Integrated Low Cut Filter Attenuation: -15 dB at 60Hz

Polar Pattern: True Semisphereâ„¢

Sensitivity: 60mV/Pa

Power Requirements: 24 – 48V Phantom, 10mA

Max Acoustic Input: 136dB SPL

Output: XLR-3 (pin 2+)

Output Impedance: 65Ω balanced

Min Output Load: 1K between pins 2 & 3

Noise: 20dB SPL (A weighted)

IMBL Light Ring Connector: Phoenix or RJ45

IMBL Light Ring Voltage: 8-28VDC @ 85-170mA

IMBL Light Ring Activation: Momentary Digital Pulse

Microphone Color: Black, White or Stainless Steel

Weight: 0.28 lbs (125g)

IMB30-B 30kHz omni, black finish

IMB30-SS 30kHz omni, stainless steel finish

IMB30-W 30kHz omni, white finish

IMBL30-B 30kHz omni, black finish, red & green LEDs, touch sensor output

IMBL30-SS 30kHz omni, stainless steel finish, red & green LEDs, touch sensor output

IMBL30-W 30kHz omni, white finish, red & green LEDs, touch sensor output

  • Conferencing / Installed Sound
  • Washer
  • Lock Nut

The even frequency response around the mic make mixing for both local reinforcement and VOIP very minimal. These mics are very sensitive and provide a clean signal to the board.

Rusty Bailey, Dominant Sight and Sound