|75,000yen(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, in order to prevent low-pass asymmetric vibration, it has the cap
cone type 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
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 2.2cm aluminum alloy dome shape tweeter (H-2201) is carried in the
The aluminum die-casting frame is adopted as each unit.
The enclosure is using the three-layer structure particle board by the
needle-leaf tree which used the Calah pine as the main material for a baffle
board and a back board.
The succession good transformation level control
is carried in a mid range and high regions.
||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: 2.2cm dome
||30Hz - 20000Hz (-15dB anechoic chamber)
|The maximum input
||140W (music signal peek)
|Output sound pressure level
||92 dB/W/m (8-ohm conversion)
|Cross over frequency
|Enclosure internal volume
||Width 400x height 710x depth of 380mm