BeoVox 2500 "Cube" Tweeters

Beovox 2500 Type 6211 were 'cube tweeter' speakers, launched at the same time as the innovative BeoLab 5000. The Beovox 2500 Cube loudspeakers were developed to complement both the Beomaster 5000 and BeoLab 5000 in order to spread the high tones. For decades, controlling the directivity and dispersion of particularly the higher frequencies has been a key concern for loudspeaker designers worldwide.

The ability to control the higher frequencies is crucial, as they carry the majority of sonic information about what you are listening to, and where the sound is coming from. During the 1960s, Bang & Olufsen’s Acoustic Engineers were just as concerned with creating a “quality stereo” experience. Whereas it did not matter just how bass frequencies were distributed (as the human ear cannot differentiate the direction of low frequencies) the problem of ensuring good dispersion of midrange and treble frequencies has always persisted.

The problem back then was the same as today; whereas there is no directional problem with the bass, how to ensure dispersion of the midrange and treble? The focus was on the treble, as the higher the frequency range, the narrower the field of dispersion. Beovox 2500 Cube, released in 1967, was an attempt at an omni-directional treble loudspeaker, where the six driver units in the cube-shaped cabinet overlapped to cover all fields. The six driver units, one on each face of the cube, presented a rather special placement problem, which was solved by balancing the loudspeaker on one of the corners. It could therefore rest on a stand or hang from the ceiling.

Of course, with the overlapping fields and reflections from walls, floor and ceiling, the solution wasn’t perfect, but the Beovox 2500 Cube received universal acclaim from audiophile circles at the time for its ability to provide omnipresent sound. Its compact proportions and design, as well as the idea behind it have all contributed Beovox 2500 Cube’s current status as a cult product.

With its six high-frequency tweeters radiating in all directions, Beovox 2500 could be base- or wall-mounted, or even mounted from the ceiling. The compact speakers ensured complete spatial distribution of the highest notes, and its maximum power handling capacity in the range above 2000 Hz was 60W. The speaker was the ideal tweeter for a Beolab system. It could be connected to Beovox 5000 and Beovox 3000.

At the 1967 spring fair in Hanover, B&O and Jacob Jensen - the designer of the speakers - received the IF award for the Beomaster 5000, BeoLab 5000 and Beovox 2500 Cube loudspeakers for outstanding and user-friendly design.

BeoVox 2500 "Cube" Tweeters technical specifications

Dimensions W x H x D 95 x 95 x 95mm 
(Height with stand: 285mm) 
Weight 1,6kg 
Power handling capacity 50 Watt peak 
Frequency response (DIN 45570) 2000 -18000 Hz 
Impedance 4 ohms 
Angle of coverage 360°