YAMAHA NS-1000/NS-1000M 12in Woofer
JA-3058A
YAMAHA NS-1000/NS-1000M
Beryllium Dome Midrange JA-0801
YAMAHA NS-1000/NS-1000M
Beryllium Tweeter JA-0513
YAMAHA
NS-1000M
1974 sale ¥108,000/each ~750usd/each (1 unit, around 1978) ¥119,000 (1 unit, around
1993)
System:3 ways 3 speakers
airtightness system bookshelf type
Use unit:It is low the
for limits: 30cm cone type (JA-3058A)For middle limits: 8.8cm dome type
(JA-0801)For high pass: 3.0cm dome type (JA-0513)
Playback frequency
zone:40Hz - 20kHz
Crossover frequency:500Hz, 6kHz
and 3 way-12dB/oct
Lowest resonance
frequency:40Hz
Impedance:8 Ω
Output
overpressure value:90dB/W/m
Rated input (JIS
continuation):50W
Maximum permissible
input:100W
Level controller:Medium treble and
continual variable type
External size:Width 375× height 675×
depth 326mm (NS1000M)
Weight:31kg (NS1000M)
Mid-range level control : ±3dB continuous
Treble level control : ±3dB continuous
Tweeter : 3cm (JA-0513)
Mid-range : 8,8cm (JA-0801)
Woofer : 30cm (JA-3058A, NS1000M)
Finish : black semi-gloss (NS1000M)
Explanation
Throwing the Yamaha individual technology of
the origin and the beryllium diaphragm etc. of the basic idea that it probably
will make those which are regularly used to be long as reference the speaker
system which was developed.It was sold 23 years to 1997 over the long period of
time when you say from 1974, it was used with the Swedish government-managed
broadcast and the Finnish government-managed broadcast as the monitor
speaker.
The beryllium diaphragm is adopted for the
diaphragm of medium high pass.This diaphragm applies electron beam vacuum vapor
deposition method and the special alloy technology which are used for LSI
manufacturing technology, being something which succeeds in development with
individual technical power, in order to produce in the high vacuum, chemical
compound is less than those which it finishes with the rolling plate actualizes
high purity.In addition, to one time atomic condition or a plasma condition
after in order to evaporate, with contraction formation difficult deep dome
shape and those etc. which have the tangential edge, have become production
possible.Furthermore, harmfulness in the atmosphere it has succeeded in also
protecting from the components by administering special coating to the beryllium
material which is easy to corrode with thickness of approximately 5 microns.Low
JA-3058A which is the 30cm cone type woofer is loaded in the limits.The
corrugation being attached cone paper which was developed from experience of the
accumulation of long time material research is adopted to the diaphragm.
In addition double coating is done the cloth
which can use the visco-elastic polymers of the thermosetting metaplasia resin
and the resonance holding down to the edge, raises the linearity for the input
signal.We adopt the ferrite magnet 156 φ to the magnetic circuit, voice coil has
become edge wise volume of the copper ribbon line.JA-0801 which is 8.8cm dome
type スコーカー is loaded in the middle limits.The beryllium diaphragm of the
diaphragm diameter 68mm by Yamaha individual manufacturing method is adopted. In
addition in the edge the tangential edge of the double coating which
impregnation it could point the visco-elastic polymers and the thermosetting
metaplasia resin which are the research result at the time of the software dome
opening departure of NS-690 and the like is adopted, sufficient form retention
central retention ability is obtained without impairing the merit of
beryllium.
In addition, voice coil adopts the large
aperture 66 φ, assures the increase of efficiency by the fact that it makes
copper ribbon line edge wise volume.As for this vibrating system in order, for
pneumatics of back of each part such as the beryllium diaphragm voice coil edge
to become identical, the design which is considered is done. Diaphragm back
leads to the center pole scooping out back cavity, voice coil back boring the
air hole through the sabot of the magnetic circuit, has passed to the back
cavity. In addition back of the edge furthermore boring the air hole through
also the outer pole, via the air hole of the voice coil bobbin, has let escape
the air of the edge.The magnetic circuit has adopted the large-sized magnet 156
φ, obtaining flux density 16,000gauss, it has improved transient quality.In
order increase of rigidity of the diaphragm and to assure the improvement of
directivity, the dome type whose radius of curvature is small is adopted. You
hold down the valley by the interference which because of this to quality on the
axis outside zone happens, by adopting the diffuser, extend quality on the axis
to possible limit wide area, to have improved being connected near crossover
frequency of the eater.To 3.0cm dome type JA-0513 which is the eater is loaded
in high pass.
We adopt the 23mm lightweight diaphragm which
is called below weight 0.03g which utilizes the characteristic of the beryllium
material to the diaphragm, we adopt the tangential edge of the cloth make which
the visco-elastic polymers and the thermosetting metaplasia resin double coating
is done, hold down unnecessary resonance.Voice coil diameter is adopted, the
aluminum wire edge wise volume of 23mm and beryllium diaphragm direct connection
is finished lightweight type even altogether vibration.In addition to NS-690
converting, the center pole of the back space of the voice coil which is the
research result of the eater and the like tapered, you hold down the influence
of resonance e.g., in non- fairing, it fills up the urethane for sound
absorbtion.Not only check of electric quality, the basic actual listening
impression is seriously considered in the design of the network section, the
audition is decided over again with cutting and trying.The ホルマール line 1.0 φ is
used to the woofer circuit, and decrease of direct current resistance and
improvement of resistance input characteristics are assured with the adoption of
the large aperture ferrite core entering bobbin.
In addition スコーカー, to large-sized ones whose
resistance input characteristics of the double winding are good are adopted to
アッテネーター which sets the level of the eater.The enclosure with the bookshelf type
4 surface finish of perfection airtightness, has adopted the design of black
finish.With NS-1000M, front baffle 24mm, the particle board of 20mm is adopted
to rear board 25mm, the side plate, the top board and the sabot. Furthermore
transferring the 24mm thick plywood to the rear board on top of the woofer
installation hole, it makes the firm stiffener, administers appropriate
reinforcement to the various parts.The finish the cross net is not with has
become the black semi- gloss finish.
