|59,800yen(one-set, around the 1979 time)
The 3 way speaker system which adopted the metal
diaphragm as all the units.
The repetition of the careful numeration, the
experiment, and the audition is raising completeness on the theme of high
efficiency and extensive dispersibility.
The 30cm metal cone type Woofer
(L-3003) is carried in low-pass.
The waveguide-plunger oscillating band has
adopted as a cone part the metal cone which had the special feature of quality
with little tone-quality failure by humidity transition which carries out an
about 1 octave (twice) expansion being stabilized in the orientation of a high
region. While attaining metrization by the aluminum alloy of 200micro of board
thicknesses, it has the cap cone structure where the rigidity of the whole
diaphragm is improved.
Moreover, the original V form gathered edge was
adopted as the edge part, the mechanical linearity of the piston vibration of a
diaphragm has been improved, the distortion and edge vibration distortion at the
time of a large swing were decreased, and it has succeeded in lowering the
minimum resonance frequency.
A 5.5cm metal veneer cone type mid range
(M-5501) is carried in the mid range.
The aluminum alloy was adopted as well
as the Woofer, the gathered edge which can take a swing ±2mm was adopted as the
edge, and the minimum resonance frequency is conjointly lowered to 280Hz with
the back cavity.
The dome shape tweeter (H-2501) which used the 2.5cm
titanium diaphragm is carried in the high region.
The heat-resistant voice
coil is adopted as this unit.
An aluminum die-casting frame is adopted
as each unit, and the unnecessary oscillation is reduced. .
three-layer structure particle board is adopted as an enclosure.
succession good transformation level control is carried in a mid range and high
||3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
||For low-pass: 30cm cone type (L-3003)
For mid ranges: 5.5cm cone type (M-5501)
For high regions: 2.5cm dome
||35Hz - 20000Hz (-15dB anechoic chamber)
|The maximum input
||120W (music signal peek)
|Output sound pressure level
||92 dB/W/m (8-ohm conversion)
|Cross over frequency
|Enclosure internal volume
||Width 370x height 665x depth of 380mm