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Ultra-high gain Omnidirectional Boundary microphone – our best!

Brand: Sound Professionals
(15 customer reviews)

From: Original price was: $299.95.Current price is: $199.95.

Our very best ultra-high sensitivity Omnidirectional boundary microphone

Please select the desired cable length below:

Product Quantity

Save 70% with this bundle! High-Definition Professional Closed-Back Studio Monitor Headphones (Black)

Ultra-high gain Omnidirectional Boundary microphone


3.5mm male to female shielded extension cable – 10 feet long

3.5mm male to female extension cable – 25 feet long

3.5mm male to female extension cable – 50 feet long

Select extended warranty and technical support options by The Sound Professionals technical team


The Sound Professionals Boundary microphone is our very best microphone for Courtrooms, Depositions, Meetings and Lecture recordings and is hand-crafted in the USA. This ultra-high sensitivity microphone offers premium sound quality. This microphone will work with all Steno writers, USB soundcards and audio recorders that provide ‘plug in power’ between 2 and 12 Volts DC at the microphone input jack. Plugged into a USB microphone, it will extend the USB mic range and is perfect for picking up sidebar conferences, etc.

This microphone is also perfect for recording lectures, business meetings, interviews, etc. The microphone element is omnidirectional, so it picks up sound in all directions equally. This microphone has an ultra-high sensitivity mic element for recording sounds ranging from extremely quiet to moderately loud sounds. It has a range of approximately 125 feet (depending on conditions).

Sound Quality
The microphone has an extended frequency response and very natural and accurate sound, providing deep, solid bass, smooth midrange and clean highs.


  • Flat frequency response
  • Can be used directly with any device that provides 2-12vdc plug in power
  • Weighs only 2.5 ounces


  • Pickup Pattern: Omnidirectional
  • Frequency Range: 20 Hz – 20,000 Hz +/-1dB
  • Sensitivity: -24dB ±3dB @ 94dB SPL
  • S/N Ratio (1kHz, 94 dB input, A-weighted): 80dB
  • Self Noise: 14 dBA
  • Maximum SPL at 12vdc: 120dB
  • Dynamic Range: 106dB, 1 kHz at Max SPL
  • Impedance: 2.2 kOhms
  • Voltage range – 2vdc – 12vdc (48v on XLR version)
  • Current draw: 500 µA
Weight 0.8 lbs

Save 70% with this bundle! High-Definition Professional Closed-Back Studio Monitor Headphones (Black)

Weight 2 lbs

Ultra-high gain Omnidirectional Boundary microphone

Weight 0.8 lbs

3.5mm male to female shielded extension cable – 10 feet long

Weight 0.1 lbs

3.5mm male to female extension cable – 25 feet long

Weight 0.1 lbs

3.5mm male to female extension cable – 50 feet long

Weight 0.1 lbs

15 reviews for Ultra-high gain Omnidirectional Boundary microphone – our best!

  1. Chris Duffield

    This is a great little mic. It can be used with your laptop or your writer (for court reporters). It can be plugged into the USB mics to get a blended sound. You can get various cord lengths, which gives you many options.

  2. kimberly a stephenson

    I use this mic in court with my laptop. It is with every penny. The quality of the sound and ability to pick up low-level boxes in court is outstanding.

  3. Stephanie A

    Love Sound Professionals and their support. Really the best of the best!!

  4. Lorraine K

    I am a court reporter and need to use this for sidebar conferences. It is a wonderful option! Plug it into your writer or USB microphone and you can pick up even the quietest sounds at the bench.

  5. Donna F

    I like the fact there isn’t an on/off switch and no need to worry about batteries

  6. Charlotte R

    Have one of these already, though square (previous model), this new model is round, excellent product.

  7. kroert225 (verified owner)

    I LOVE this boundary mic because it lays flat and doesn’t easily get knocked over like my previous mic.

  8. Jennifer Vaillancourt (verified owner)

    This is the best microphone I’ve purchased. Audio comes in crystal clear and picks up the entire room. I would very much recommend.

  9. cjwalsh (verified owner)

    This is a very sensitive mic. Great for meetings in a large room with many people. Very clear.

  10. Linda B Florida

    “Microphone works excellent!”

  11. Debbie Linehan (verified owner)

    Love this mic. It is my second one as I wanted an extra since it can be used with my laptop or my writer (court reporter) The quality of sound is fantastic. The customer support/help is 5-star plus every time!

  12. tamile

    I now have four of these mics to use with a four-channel mixer (also from SP) for large rooms and soft-spoken people! I cannot say enough positive things about my experience with customer support with Sound Professionals!! Even when you don’t have an appointment, if something comes up, they are usually able to respond quickly and get you on your way. Love SP!

  13. Micheal Roberts


  14. Melissa Gum (verified owner)

    This microphone provides exceptionally clear recording quality and is perfect for courtrooms or depositions. Great value and exceptional customer service. Thank you, Sound Professionals!

  15. Jahnene Admire (verified owner)

    The zoom kit took some time to set up and function properly. Ended up having to involve Professionals tech support and we got it up and working. The tech support was extremely knowledgeable about not only their own products but of my court reporting software as well, and that made all the difference in the world.

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