Bang and Olufsen Hifi set This package contains: 2x Beolab 4000 with rare black covers 2x power cord cables -------------------------------------------------------------------- BeoLab 4000 Active Loudspeakers Product Specifications Specifications : BeoLab 4000 had a long and successful history with the company. Introduced in the mid-1990s the speakers were novel when they were first sold in their unusual ‘leaf-shaped’ (or piscine) design and colored aluminum bodies. They were originally sold for use with the BeoSound Ouverture / BeoSound 3000 music systems but could be used within any modern Bang & Olufsen master unit which were fitted with necessary Power Link connectors. Their unusual design ensured optimal heat transfer away from the speaker units, even when placed within a bookshelf. The single-piece aluminium construction made the speaker not only light and robust, but it eliminated dissonance problems caused by joints and corners in normal speaker cabinets. 59W of music power was obtained from each unit and Adaptive Bass Linearization (ABL) was utilized to enhance bass reproduction.