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.