The beryllium ribbon tweeter which improved ribbon
tweeter program transfer-R 7A, and was developed.
It is a whole surface
drive system which the whole diaphragm surface is the same phase, and also
receives driving force uniformly.
Since the vibration portion itself is an actuator, very light vibration system without futility can be constituted, and the linearity which was easy to move a diaphragm and was excellent has been realized.
As a diaphragm material for ribbons, it is the lightest-weight, moreover
the beryllium of a high rigidity is adopted, and a high efficiency and
input-proof -ization are realized.
Furthermore, since the ribbon is fabricated by the original process to the
pattern of right 6-sided pyramids and it does not become a linear line at all
about a cutting plane in length, width, slant, and which orientation, it has an
anxious firm structure of bending which is not. And the exact waveguide-plunger
motion is realized by preparing the big edge of compliance in the termination of
the rigid-body fraction of a ribbon, and also directing in the shape of a
sandwich by a silicon elastic body.
Alnico 750 is adopted as a magnet.
A uniform magnetic-flux distribution is secured by the density of flux
density 7,400G., and the transient is raised sharply.
The low inductance
power-feeding scheme which reduced the inductance to a super-high region sharply
This suppresses an occurrence of few inductances of a
power-feeding part, and the energetics of a high region is raised.
wide band and the matching transformer of a low-loss design which made
oxygen-free-high-conductivity-copper foil the multilayer sandwich volume are adopted.
The adoption with a linear initial permeability property of a
permalloy core has realized high resolution.
The gilding treatment is
performed to the termination.
The tone quality was pursued and the
protection network with the fuse of an oxygen-free-high-conductivity-copper cap
The table-lamp base which can be arranged as it is is
attached on a cabinet.
|Play frequency band
||5kHz - 120kHz
|The maximum input
||100W (at the time of 5kHz and a -12 dB/oct
||50W (at the time of 5kHz and a -12 dB/oct
|Output sound pressure level
|Cross over frequency
||- It is 5kHz or more at the time of 12
|The total magnetic flux
|Gap flux density
||Width 134x height 89x depth of 179mm