Active bass-reflex subwoofer. Active subwoofer with a class-D amplifier and a built-in stereo Xover for driving the active full-range speakers. The careful acoustic design provides high pressure in small sizes. The birch plywood box and high-quality transducers let EARTH118 be a high efficiency bass cabinet. Its great quality and reliability let it be a versatile device, suitable for several environments. Equipped with one 18'' custom built long excursion ferrite woofer and a class-D amplifier which provides high power and built-in stereo cross-over in a very light weight. Dimensions: 506 x 536 x 580 mm. Weight: 39 kg.