MinusNine VSB

Ultra-miniature Noise Free Wireless Earphone with swing-tray battery faceplate

The MinusNine VSB wireless earphone is a revolution in covert communications technology with a physical profile so small that it can be fitted deep into the ear canal making it imperceptible by others as well as comfortable for use in the most challenging special operations. MinusNine VSB exploits a technology called Vestigial Sideband Modulation to transmit audio signals over a short range from a neck loop or flatpack without responding to power or data borne interference. This (patent pending) technology is unique in this type of device and not susceptible to eavesdropping or external masking keeping communications secure and reliable. A range of neckloops and shoulderpads are available which can include PTT switches and microphones as well as a car loop amplifier.

  • Frequency Range: 300-3000Hz
  • DSP Type: Custom Hybrid, DSP and EEPROM
  • Distortion: <3% @ 1kHz
  • Receiver: Magnetic
  • Maximum Output Sound Pressure Level @1kHz: 96dB 
  • End of Battery Life: Audible Beep
  • Battery: 1.4 VDC A10 Zinc Air or Equivalent
  • Minimum Operating Voltage 1.1 VDC
  • Typical Battery Life (A10 Zinc Air) >50 hours
  • Sensitivity (Standard) 66dB@1kHZ ±3dB/10mA/M
  • Amplifier: Digital Hybrid with custom Hardware + Firmware
  • Weight (including battery): 1.2 grams
  • Operating Temperature Range: -10°C to +40°C
  • Wax Filter Type: Replaceable Mesh Filter
  • Colour Options: Beige, Mid Brown, Dark Brown.
  • Custom Fit Option

It’s coming. Please refer to sales office.

Wireless Earpiece Accessories



Inductive neckloop with sensitive integral microphone for VSB and basebad wirleless earphones


Inductive brooch for baseband wireless earpeices


Shoulder Pad

Inductive shoulder pad with sensitive integral microphone for VSB and basebad wirleless earphones


Seat Pad

Inductive seatpad VSB and basebad wirleless earphones



Replacement HF3 ear-wax guards for all Sensorcom wirless earphones. BeanBugs need HF4


A10 Zinc Air Batteries

We recommend Rayovac ZincAir batteries to give Sensorcom wireless earphones optimum performance


Hygiene/Fit Sleeves (4 sizes)

Soft PVC sleeves to assist the fit and security of wireless earphones

Vehicle Loop Amplifier

Vehicle loop amplifier that will support baseband and VSB wireless earphones. Wide DC voltage operating range: 4 – 20 VDC.


Vehicle Roof Loop

Cable loop designed and optimised for inseting into the roof of vehicles


Spring-top Storage Pouch

Spring top storage pouch for wireless earphones, batteries etc.