Fullrange loudspeakers are enjoying another comeback and arousing increased interest, embodying, as they do, everything that a point sound source should be. Large fullrange loudspeakers like the B200 6ohm have the additional characteristic of transmitting the sound in a tightly bundled beam, which produces a very tangible, three-dimensional effect and allows individual instruments to be easily located. A drawback of the system, however, is that this beaming process and the sensitivity are reduced at lower frequencies. The PENTATON BB was developed specifically as a cabinet based on the legendary B200 6ohm but designed to compensate for these two disadvantages. In a similar way to the QUADRO, additional fullrange drivers are switched in to supplement the central driver, which is connected direct to the amplifier without an intervening filter, as the frequencies go down the scale. This allows the B200 6ohm to develop its full potential with none of the impairments caused by frequency-dependent signal-carrying components, while the BG20 8ohm, that are optimised for low-frequency response, maintain the extremely high sensitivity and beaming effect right down to the bass range. The additional fullrange drivers are arranged symmetrically in two groups around the main speaker, which again creates an acoustic focus in the centre of the speaker cabinet. On top of this, the baffles in enclosures 2 and 4 and in enclosures 1 and 5 are angled inwards by 6° and 12° respectively. This feature guarantees that, assuming a typical listening distance of approx. 3 m, each of the drivers is exactly the same distance away from the ear and at the same angle. Given the size of these speaker cabinets, this is the only way to ensure that the phases of all the drivers are in sync across the entirefrequency range.
