Quattro3 USB and Smart Interface (MT303) – EOL


The Quattro3 (Q3) USB is a high-quality conference speakerphone that will turn any room into a professional conference room. It has an exceptionally large pickup and broadcasting range, yet is small in size and discrete in design. The Quattro3 utilizes multiple microphones, a uniquely designed speaker, and a powerful DSP to achieve commanding performance. The Quattro3 MT303 model connects to any computer as well as any analog audio device. It comes with a 2.5mm to 3.5mm cable adaptor that allows you to link to almost any smartphone or tablet device.

The Quattro3 MT303 is an ideal USB and analog audio solution for:

  • Smartphone and tablet conferencing
  • Small offices or home offices
  • Small to very large conference rooms
  • Classrooms and training rooms

Four microphone beamforming array, Full duplex communication, Echo cancelling, Noise suppression, De‐reverb, Automatic gain control, Daisy chainable, Single source daisy chain powering, Bridging between USB and “Smart” device, Internal battery, Interchangeable interface modules, Durable aluminum casing, LED lit control buttons


  • USB cable
  • International power supply adaptor
  • Daisy chain cable (Ethernet)
  • 2.5mm (male) to 3.5mm 4pin (male) cable
  • Interchangeable wire slot cover
  • User manual

Warranty: 2 years

The Quattro3 MT303 USB and Smart Interface connects via:

USB to your computer ‐ this connection is for any session using your computer, such as Voice Over IP applications (Vidyo, BlueJeans, FuzeBox, Skype, Microsoft Lync, etc.).

Analog cable to your “Smart” device – this connection is done via a 2.5mm connector and a provided 2.5mm (male) to 3.5mm 4pin (male) cable or any standard analog cable you have with a 2.5mm connector.




UBS interface (mini B connector)

3.5mm external loudspeaker and microphone jack

Volume Up / Volume Down buttons

Daisy chain expandability of up to 15 units

Power consumption: 5V 500mA peak through USB and wall mount AC/DC converted.


Frequency response 50Hz – 16 KHz

Low latency (10ms)

Broadcast level (peak): 92dB SPL @1m (5 watts RMS)

Three-way bridging capability

Noise cancellation > 10dB (without pumping noise)

100% full duplex – no attenuation (in either direction) during full duplex

High-end performance confirms to ITU-T G.167

Acoustic echo cancellation > 40dB with conversion speed of 40dB/sec

Residual echo is suppressed to the environment noise level, preventing artificial ducking of signal

4 high-quality directional microphones

Direction-finding algorithm (determines the presence and direction of a speaker)

Beamforming algorithm (forms and directs audio beams towards a defined direction)

Automatic voice-level adjustment (AGC)


7” diameter, 1-7/8” height

Weight: 1.75 lbs

Metal case and metal grill mesh for high RFI immunity and product durability


Plug-and-play - No installation or drivers

Audio setup utility is available for Windows

The setup utility helps monitor the audio input and output level but is not required

Recording utility is available for Windows

Recording utility allows you to record conversations to your computer via the device

Operating systems: Windows 98 and up / Linux / MacOS.


7 hours of battery talk time with secondary interface