The QRD has become a classic shape in architectural acoustics. Since its inception in 1987, it can now be found in churches, schools, theaters and studios worldwide. The Diviewsor® A79 Panel is based on the QRD and designed to be used where views through the unit are desired. The surface of the Diviewsor® A79 Panel is designed to provide a more uniform sound field through mid and high-frequency diffusion. At the same time, the sturdy, acrylic wall construction of the unit limits the amount of sound energy that is removed by absorption.