|
(11) | EP 1 755 357 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||
| (54) | Coaxial two-way drive unit for horn speakers |
| (57) A coaxial two-way drive unit (1) for horn-loading speakers, comprising a first voice
coil drive unit (6, 8) associated with a second voice coil drive unit (18, 19). The
first unit is frustum of cone shaped, while the second unit is shaped like an annular
diaphragm (19) with the voice coil (18) arranged on a circle placed between the inner
and outer circular perimeter of said annular diaphragm (19). The first drive unit
(6) is associated with a truncated segmented substantially conical element (3), with
a first end facing towards the cone and a second tapered end facing towards the mouth
of the drive unit, the second drive unit being associated with an ogive-shaped element
(20, 31) cooperating with said substantially conical element and facing towards the
mouth of the drive unit. The first and second drive units (6, 19) are associated with
a respective magnetic structure with high-energy permanent magnets that define a first
and a second air gap cooperating with the voice coil (8) of the cone-shaped element
(6) and with the voice coil (18) of the annular diaphragm-shaped element (19).
|