|33,600yen(one-set , around the 1972 time)
The indirectional speaker system considered and
developed so that a spread of sound peculiar to raw sound field which is rich
and is wrapped in, such as a concert hall, might be told as it is.
para-drive scheme by two 16.5cm cone type units is adopted as low-pass.
Since a real cone space product increases sharply, a play of a heavy bass is
The 5.8cm cone type unit designed in consideration of relation
and tone of a low-pass sound is adopted as the high region.
In order to
avoid a backplane interference with a Woofer, the back side is covered with the
large-sized tight cover.
The reflector is attached to the upper and
lower sides of a fraction to which the unit was attached, and the elastic wave
is made to radiate in all the orientations uniformly.
The network which
has a direct coupling woofer by a mechanical filter and a gently-sloping curve
of 6dB / oct row cut in a network is adopted, and natural and smooth relation
has been obtained.
Moreover, the volume type in which a precise coordination
is possible is adopted as the attenuator for high regions.
has adopted the curve member of natural hinoki material as four fields, and also
spreads the newly developed acoustic diffuser around the interior, and makes the
diffusion of sound much more precise.
|(From a top to a sequence )
||2 ways, 3 speaker bass-reflex scheme, and a
||For low-pass: 16.5cm cone type x2
high regions: 5.8cm cone type
||55Hz - 20000Hz
|Maximum permissible input
|Output sound pressure level
|Cross over frequency
||Width 370x height 563x depth of 370mm