La Sphère System,
The acoustic master piece
Cabasse achieved the acoustic Holy Grail with La Sphère, the first full range system behaving like a true point source.
Made possible only through the combination of the unique Cabasse technologies and innovations in loudspeakers and
digital processing:
TC23 three-way co-axial driver
The three-way co-axial transducer forms a portion of a pulsating sphere and presents
a constant directivity index, as the smaller membranes are not affected directivity
wise by the larger ones.
This is obtained with no compromise on the linearity, efficiency and power
handling parameters of each driver. Our engineers have used all their expertise
and experience in the exclusive use of high end technologies; like the in
house die-casting of Rohacell foam, or the most powerful rare earth magnets
available. Fitted in a lens made from a sandwich of composite materials with
high damping capacities, the TC23 operates over the 80 Hz to 35,000 Hz
bandwidth.
The production of the new polyether tweeter membrane is carried out by
computerised machines created by our team. The process is automatic but
very time consuming, preventing any alteration of the characteristics of the
material involved and ensuring accurate and identical parameters for every
item produced. Rigid, light and damped, this diaphragm brings a perfect linearity
to the response curve up to 35,000 Hz, with an excellent power handling and
reliability.
The new membrane material was also selected for its excellent rigidity/weight ratio
and the perfect mechanical homogeneity with the ring membranes of the midrange
and low-midrange units.
22’ honeycomb dome woofer
To achieve linear reproduction down to 20 Hz and under, our engineers
created a special version of the 22” unit 55ND46 designed for the Saturn 55
reference subwoofer. The basket of the woofer is designed to fit a spherical
enclosure and the moving elements to work in a closed volume. Thanks to
the extra rigid, but light, Nomex honeycomb dome structure of the membrane,
the long throw powerful magnet gap and the double spider, the combination
provides high levels, speed and accelerations without the requirement of a
huge loading enclosure.
This is a key element because the sphere behind the three-way co-axial
TC23 has to be of a decent size, so as not to interfere with the quality and
directivity of the upper frequencies, while applying the Spatially Coherent
Source principles.
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