The black MilleniaOne CT 2.1 Speaker System from Paradigm is premium CT (Compact Theater) system designed for superior audio experience. The system includes 2 cast-aluminum satellite speakers with adjustable table stands and an extruded-aluminum subwoofer with a built-in amplifier and a cradle for vertical positioning which boasts a 14 x 3" monocoque cone with patented corrugated surround technology. It has Dolby Digital sound (anything from 1.0 to 5.1) down-mixed and remixed to 2.1. The system is fully powered and does not require a receiver. The speakers are housed in high-quality cast-aluminum cabinets and feature push-style gold-plated binding posts. The low-profile subwoofer is designed for versatility: stand it up lay it down or hide it under a couch without affecting sound quality.