Phoenix Audio MT303 Quattro3 USB+Smart Conference Speakerphone

SKU: MT303
Condition: New

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Phoenix Audio MT303 Quattro3 USB & Smart interface conference phone has both a USB and a "smart" analog audio interface.  The USB outlet allows you to connect to a computer for any VoIP sessions such as Skype, Vidyo, etc.  The "smart" interface on MT303 allows you to connect to any analog audio device.  Included with MT303 is a 2.5mm to 3.5mm cable adapter that enables connection with smart phone or tablet devices.  The internal battery provide for approximately 7 hours of use.

It's easy to set up with plug-and-play so you don't have to be an installation expert.  The Quattro3 MT303 conference phone will work with any computer based app thru its USB interface. Its unique audio capabilities and small sophisticated design makes Quattro3 ideal conferencing solution for both medium and large room settings.  The hardware and software design of the Quattro3 provides an extended range of audio pick-up and broadcasting which allows Quattro3 to cover even larger spaces without the use of satellite microphone or speakers. 

The Phoenix Audio Quattro3 MT303 also offers daisy chaining capabilities with expandability of up to 15 units - the built-in daisy chain interface has 2 connectors for link-up and link-down.  Daisy chained units not only act as an active microphone, but also speakers, delivering the full conferencing experience to all participants, whatever the venue.


  • 4 microphones
  • 4 speakers
  • 5 echo cancelers
  • Full duplex communication
  • Support an external mic/speaker with voice lift thru a 3.5mm audio jack
  • USB interface (mini B connector)
  • PSTN interface with built-in dialer
  • Include standard RJ11 telephone jack
  • Proprietary beam forming array algorithms
  • Voice activity detectors
  • De-reverb
  • Steady state noise attenuators
  • Dynamic Signal Compression
  • Bridging between USB and "smart" devices
  • Durable aluminum housing
  • LED lit control buttons
  • Interchangeable interface modules
  • Automatic gain control
  • Noise supression
  • Single source daisy chain powering
  • Internal battery
  • 2 years manufacturer warranty


Comes with USB cable, international power supply adaptor, Ethernet Daisy Chain cable, 2.5mm (male) to 3.4mm 4pin (male) cable, interchangeable wire slot cover, and user manual.

Please note:  While any Quattro3 can be daisy-chained (regardless of interface) the daisy chain power method requires all units in the chain to have some type of secondary interface card (Quattro3 301 will not work).  The “Daisy Chain Power Kit” utilizes a 48V power supply not included with the Quattro3 and must be purchased separately. The daisy chain power method will work with up to 8 consecutive units before requiring another power source, and up to 15 units can be chained with a standard Ethernet cable.

Additional Info
Additional Info
Model MT303
Manufacturer PHOENIX AUDIO
Condition New
Type Conference
Expandable Yes
Input Types PC (via USB), Mobile Phone
Speakerphone Full-Duplex
Display No
Power Adapter Included Yes

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Customer Reviews (2)
I like the fact that you can expand this. The sound is rich and carries itself throughout the room. The price is high, but it is a good conferencing device. We plan on using this for 5 more remote workers Review by ronniec (Posted on 8/11/14)
Perfect for video conferencing on my iPad
This is basically ready to go right out of the box. I do a lot of video conferencing on my iPad and the quattro MT303 works perfectly. I'm always amazed on how clear the audio quality is. There's never any echo issues and the noise supression works perfectly. It features full duplex communication so the conversation never feels cut off. I couldn't ve happier with my purchase. Review by Adam V. (Posted on 8/9/12)
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