Issues at the corner

Tetra is developed to solve the issues at the corner of the ceiling.

Based on our original technology through Pyramid wall, we solve the complicated and difficult issues at the corner on the ceiling

Like we do with Pyramid wall, diffusion gives the listening spot the clarity of the sound without losing the energy solving the issues on unnatural or unclear sound at the corner of the room.

Easy installation


With the pins inside the box, you can set Tetra up easily.

The whole is too small to stand out after Tetra is taken off from the ceiling or the wall.

Technology: Control whole.

The 2 sized control wholes : large and small on the face works on both diffusion and absorption over high to low frequencies.

The sound or its energy out of control due to situations of the room or volume of sound can be floated and controlled by the wholes on the back side of Tetra.

Pyramid head and the wholes on its back side extend the size of the face virtually and can control the size of the space more than physically.


  • VGP 2022Visual Grand Prix 2022
  • VGP 2018Visual Grand Prix 2018
  • VGP 2015Visual Grand Prix 2015
  • VGP 2014Visual Grand Prix 2014
  • VGP 2014 SummerVisual Grand Prix 2014 Summer


W400 x H310 x D310mm


  • Ivory TE-IV (Ivory)
  • Black TE-BK (Black)


  • fixing pin