October 1, 2019


30kHz Boundary Microphones


Low profile tabletop boundary microphones for temporary or permanent installations

  • 30kHz flat frequency response optimized for speech

  • Reduced pickup of paper shuffling, table thumping and HVAC noise

  • Available in black, white, stainless or Nextel® Dark Black finishes

From $699


  • Specially engineered filter to minimize table thumping and HVAC noise
  • Reduced pickup of paper shuffling
  • 30kHz frequency response optimized for speech
  • Ultra high intelligibility
  • More gain before feedback
  • Near perfect polar pattern
  • True Semisphere™ omnidirectional polar pattern
  • RF resistant
  • Rubber, shock absorbing pads eliminate vibration noise
  • Designed to allow cable to exit from the rear or bottom of the microphone
  • Low profile design
  • Only 4.1 inches (10.4cm) in diameter
  • Available in black, white, stainless steel or Nextel® Dark Black finish
  • Primary applications include teleconferencing, distance learning, surveillance, boardrooms, government facilities, worship facilities and ambient room miking

Frequency Response: 60Hz to 30kHz -3dB @ 1 ft (30cm)

Low Frequency Rolloff: 60Hz, 15dB/octave

Polar Pattern: Omni Semisphere™

Sensitivity: 60mV/Pa

Power Requirements: 24-48V Phantom, 10mA

Max Acoustic Input: 136dB SPL

Dynamic Range: 116dB @ 1kHz

Output: XLR-3 (pin 2+)

Output Impedance: 65Ω balanced

Min Output Load: 1K between pins 2 & 3

Noise: 20 dBA (Typical)

Microphone Color: Black, White, Stainless Steel or Nextel® Dark Black

Dimensions: 4.1 x 4.1 x 0.45 inches (104.1 x 104.1 x 11.4mm)

Cable Length: 10’ (3.04m) with installed XLR-3M

Connector Type: Low profile cable terminated into a 3-pin XLR-M

Weight: 0.36 lbs. (162g)

CTB30-B 30kHz omni, black finish

CTB30-NB 30kHz omni, Nextel® Dark Black finish

CTB30-S 30kHz omni, silver finish

CTB30-W 30kHz omni, white finish

  • Conferencing / Installed Sound