The PAX ProAV Group
  • ISC WEST 2021
  • July 19-21, 2021
  • Sands Expo, Las Vegas
  • Visit Penton @ Booth 14103
  • InfoComm 2021
  • October 23-29, 2021
  • Orlando, Florida
  • Visit Penton @ Booth 4972
Phone: 1-888-883-8383 | Remote Support

Line Arrays

SMARTVOX II® - Vertical Loudspeaker Array

Smartvox-II is a vertical loudspeaker array that uses a linear spaced speaker arrangement in combination with passive phase shifting, passive power shading and filtering, to obtain a constant directivity index for multiple frequencies (Concept is based on the Messenger linear spaced line-arrays with patent algorithm). The fixed Azimuth angle of -12 degrees, allows for the unit to be placed vertical against any surface, resulting in more clarity, lower reverberant field and therefor a much higher 'direct-to-reverb' ratio, leading to a higher intelligibility figure (STI).

Ordinary line-arrays radiate a cylindrical wave front that moves in a straight line from its source. Due to this a normal column needs to be tilted forward to obtain good coverage of the listening area (figure 1). This is needed to focus the sound waves in forward direction into audience area trying to avoid annoying reflections from other surfaces. Loudspeakers in general are not only producing sound forwards but also backwards especially for the lower frequencies. These sound waves are reflected by the back wall to which the array is fixed. These waves are mirrored according to the mounting angle of the array and will fill the environment with un-wanted artificial reverberation energy, leading to lower direct-to-reverb ratio and to poor intelligibility.

By "aiming" the beam of a loudspeaker electronically using passive phase-shifting, power-shading and filtering technique for constant directivity, you can keep the column placed vertical against its surface (figure 2) minimizing any additional energy to the reverberant field, resulting in more clarity and a much higher intelligibility.

The Smartvox-II distinguishes itself through its precise sound direction pattern in the vertical plane, independent of the frequency. Due to constant sound pressure over long distances fewer columns are needed, through which less indirect sound is produced.
  • Filtering based on the Messenger Series patented algorithm
  • 120 degree horizontal dispersion
  • Only a - 6 dB drop in SPL over 75 feet
  • Very low reverberant field
Maximum power rating 50 Watt
Maximum operation voltage 50 / 70 / 100 Volt
Frequency response 200 Hz - 12 kHz
Horizontal coverage 120 degrees
Azimuth angle -12 degrees
Q Factor / Directivity index (dB) 14,1 / 11,5 dB
SPL 1 kHz, 1W, 1m 93.5 dB
Standard colour Snowwhite
Loudspeaker tappings 6, 12, 25, 50 Watt
Measurements 1560 mm height, 90 mm width, 110 mm depth
  • Place of worship
  • Atriums
  • Museums
  • Lectern application
  • Reverberant spaces