|210,000yen(one-set, around the 1979 time)
The speaker system developed aiming at the play of
the amount level of Oto which makes it bear a close resemblance to a live
performance as it is.
128H of the diameter of 30cm is adopted as
A 4.7kg magnetic circuit is carried in this unit. In this first
unit to adopt a ferrite magnet by JBL, the technology of a SFG= symmetrical
magnetic-field type is adopted.
This has prepared the Faraday loop in the
pole piece lower in order to aim at the distorted falloff which adopts the
structure of the magnetic-field candidate which moreover employed the point with
few secular change of magnetic property efficiently by the low distortion which
is a merit of a ferrite, and is produced from a magnetic-flux inter-modulation.
Thereby, the physical characteristics of a Woofer, such as a low-pass property
and input characteristics-proof, are improving sharply.
The optimal mass, hard cone paper, a copper ribbon line edgewise volume voice coil of the diameter of 7.5cm with density, etc. are adopted as vibration system.
In order to lengthen a response to
super-low-pass one and to improve a dynamic range, diameter passive radiator
PRof 30cm of new development 300 is adopted.
LE5-10 of the diameter of
13cm is adopted as a mid range.
The hard thing was adopted as cone paper and the thing with a flux density of 14000 gauss is adopted as the thing of the copper ribbon line of the diameter of 2.2cm of the precision design which is stable also to an excessive input in the voice coil, and a magnetic circuit.
033 which is a diameter dome shape tweeter
of 2.5cm is adopted as a high region.
The diaphragm has adopted the thing
made from the linen of a resin impregnation, and its linearity is good also to a
pulsive upper register signal at adoption of the diameter aluminum ribbon line
voice coil of 2.5cm, or a 14000 gauss magnetic circuit, and it has a sound
distorted also at the time of the Oide power which is not.
modification was added, relation of an inter-unit was made smooth much more, the
included circuitry was uniquely printed-circuit-board-ized in the network, and a
phase revise circuitry, an impedance corrective network, etc. which prevent the
phase disorder of an inter-unit are adopted as it.
Moreover, the succession
variable level control is carried in the object for inside compasses, and upper
The enclosure has adopted the hard particle board of 1.9cm
thickness as an overall.
||3 ways, 3 loudspeaker passive radiator
scheme, and a floor type
||For low-pass: 30cm cone type (128H)
mid ranges: 13cm cone type (LE5-10)
For high regions: 2.5cm dome shape (033)
Passive radiator :P R300
Exclusive 3 way network
||200W (succession special NetWare program)
|Cross over frequency
|Output sound pressure level
||88dB (new Japanese Industrial Standard)
||Width 432x height 1054x depth of 330mm