For spaces intended to remain lively, yet controlled, the Auralex MetroFusor™ V2 is an affordable choice among diffusers. MetroFusor addresses standing waves & flutter echo without removing acoustic energy, due to the design of its randomized dispersion pattern. With its contemporary design in a dark gray color, MetroFusor will enhance the aesthetic of any critical listening environment. The MetroFusor V2 is self-extinguishing to UL-723 specifications but is NOT intended for commercial use. Painting the MetroFusor is not recommended as it may alter flame retardancy.