Focal Sub One Active Subwoofer Black - Sub One is a subwoofer composed of two 8" (20cm) Slatefiber cone woofers, manufactured in France by Focal. With a total RMS power of 200W, it covers a frequency band from 32Hz to 120Hz. Sub One offers great dynamics whilst maintaining low distortion. Designed with a focus on its width and front vents, Sub One integrates easily into a room, along a wall or under a desk.