Cerasonar 4080 Ultimate

Invisible loudspeakers were often seen as a compromise. They had sufficient quality for background sound, but lacked in dynamics and resolution compared to conventional loudspeakers.

The panel material is the decisive component for the quality of the high-frequency reproduction. This can be compared to the aerodynamics of a car. Even a powerful engine cannot compensate for poor aerodynamics, so it is the streamlined design that is decisive for achieving high speeds. In our case, we have chosen a suitable panel material to provide for an excellent basis for the reproduction of high tones.

By using a very light but nevertheless hard material it is possible to reproduce even the highest frequencies pure and cleanly. The two mid-/high-range exciters thus do not require equalisation of the high-frequency range and therefore achieve a treble quality that is no way inferior to a conventional loudspeaker.

Important for us was that the driver delivers a fast impulse behaviour to keep up with the exciter drivers. Fundamental structural modifications were necessary, that are not common for standard low-frequency drivers.

We achieved this by using a stiff and light carbon fibre cone. At high excursions, the cone keeps stable and doesn't flex - important for reproducing sound without distortions. Since the speaker surround represents the next "bootle neck", it was designed drive-optimised and can thus properly carry away the load.

To guarantee a linear frequency response, we added a copper ring on the pole piece for impedance correction. Thanks to the strong magnet system, the new 4080 ultimate can also be used well in smaller volumes such as back boxes or masonry mounting frames. In addition, the rigid basket is extensively ventilated to ensure heat dissipation even under heavy load.

We have linearised the midrange with counterweights and developed a filter that ensures a clean crossover between the woofer and the midrange/tweeter.

In addition, the two paths each have an independent PTC to protect the speaker in case of overload. More over, the exciter drivers are equipped with two aluminium heat sinks to ensure efficient heat dissipation even under heavy load.

By using proprietary woofer and exciter drivers designed in-house, we have managed to reduce the speaker crossover to a minimum of components. This has allowed us to use components, such as high quality foil capacitors in the signal path. No resistors that consume unnecessary energy are used as a result of the homogeneous tuning of the woofer and the exciters.

For connecting of the speaker wire we use the Wago 221-613 terminals, cable diameters up to 6 mm² can be connected quick and reliable.