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 coloured aluminiumbodies. 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 Linkconnectors.
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 Linearisation (ABL) was utilised to enhance bass reproduction.
With BeoLink Wireless 1, an around-the-home music system could easily and discretely be made using just the wireless system and a pair of Beolab 4000 active speakers.
BeoLab 4000 was revised in 2007 with the MK2 version using ICEpower units replacing former ‘AB’ power units. Many audio connoisseurs think that the Mark II version was inferior to the former ‘AB’-powered speaker, offering less of a mellow sound. BeoLab 4000 ceased production spring 2013.