Douro is a geometric diffuser, designed to scatter and diffuse mid-high frequencies. The solid construction of the unit limits the energy lost to absorption, helping you create a balances, homogenous sound field.The Wave shaped pattern guarantees a uniform diffusion pattern. Scattering begins at 400 Hz and offers effective and even diffusion up to 5000 Hz. Douro is available in two sizes, in a selection of premium wood and lacquered finishes.Douro can be used on walls and ceilings, and can be mounted in any orientation, according to the diffusion pattern you need. Features Type:1D - Geometric DiffuserSchroeder Optimised curve.Scattering range:400 Hz to 5000 HzPurpose- Improving low frequency response- Flutter echo control- Specular reflection control- Enlarging sweet spotRecommended for- Hi-Fi Listening Room- Media Room- Home CinemaDimensions:FG - LW | 595x595x82mmFG - NW | 595x595x82mm