Gravis I is the compact subwoofer in the range. A down-firing 8-inch long-throw driver and front-firing passive radiator deliver useful extension in rooms where a larger cabinet would dominate the space.
Its 150-watt Class AB amplifier, LFE input, line input, and high-level Speakon connection support both stereo and theater use. It is a natural match for Lumina and compact Sonetto speakers when the goal is fuller bass, not maximum cinema output.