1 Pair of SKYEC-2 2x2x8" Ceiling Diffusors


Selected Model Price: $453.26
List Price: $568.00

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RPG®'s Skyline® is the industry's first omnidirectional primitive root number theory two dimensional diffusor.  The Skyline® scatters incident sound uniformly so that the acoustic glare in all directions is minimized.

The uniformity of diffusion is characterized by the standard deviation of the 1/3 octave polar response, for a given angle of incidence.  For each of the 37 angles of incidence, 37 backscattering impulse response measurements are made at 5° increments between 0° and 180°.   The Diffusion Coefficient is the mean standard deviation for all angles of incidence, normalized to the standard deviation of a delta function (1 equals ideal diffusion).  The data illustrate the exceptional uniformity of diffusion above the diffraction limit (565 Hz = 1130 ft/sec/2'), which is related to the 2 ft. dimension of the panel.  The Diffusion Coefficient of a flat reflective panel is shown for comparison.

The solid expanded polystyrene core of the Skyline® provides useful low frequency absorption.

The Skyline® is easy to install on walls or ceilings using the supplied hook and loop fasteners.  Apply both sides of the hook and loop fastener to the rear of the Skyline® in each corner on a flat area.  Remove the protective paper from the exposed side and apply to the wall.  For permanent mounting, construction adhesive must also be applied, where space allows on the back of the unit, along with the hook and loop fasteners.  The Skyline® can also be inserted into a T-bar ceiling grid.

WARNING: The Skyline® is fabricated from flame- retardant, high- density expanded polystyrene foam. It is the nature of this material to have rough surface imperfections and contain steam vent holes. Some of these imperfections can be partially concealed by a factory paint process. If you are interested in a painted product, RPG® offers a painted version in Duron Multispec Fine Fleck paint. RPG® does not recommend that the Skyline® be painted in the field and assumes no responsibility for any damage resulting from field painting.


  • Patented optimized primitive root reflection phase grating
  • 156 distinct phase blocks
  • Suppressed specular scattering
  • Universal mounting design
  • Portable, lightweight construction
  • Unique acoustic sculpture


  • The large prime number design offers the acoustical industry's highest reflection density.  This design provides a natural sounding ambiance and the most effective diffusive control of interfering reflections
  • The specular suppression afforded by the primitive root number theory design means the "mirror" reflection component of the scattering is reduced creating a more diffuse sound field
  • The lightweight and universal Skyline® design with perimeter flange permits mounting on a wall, ceiling, or free standing portable gobo partitions with hook and loop fasteners or in a T-bar suspended ceiling grid
  • The complex number theory topology allows one to work closer to a wall surface than would normally be the case.  Thus, small edit and recording control rooms can be optimized
  • The Skyline®'s unique sculptured topology makes it a welcome aesthetic addition to the decor of the room
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