t.akustik WDS-7 GR Diffuser 8pcs Set

Hard foam diffusers, extremely light, so no density as in a wood diffuser, but a solid reflective surface. Unless you have a really large room I cannot imagine anyone needing eight of these and it would be better if they sold him in smaller groups like two or four at a time. I am about to set them up and will add another review to see how they sound, but they are inexpensive diffuser so you get what you pay for.