The Gravis III, V and VI are the most powerful active subwoofers Sonus faber has ever designed in order to optimize the dynamic impact and the sonic reproduction depth. Gravis collection, the active subwoofers line dedicated to the reproduction of low frequency, is able to match all Sonus faber full-range loudspeakers collections. Gravis III naturally fits in with Olympica Nova collection, while Gravis V and VI represent the perfect choice to those who want to complete Homage Tradition and Reference collections.