|AR(Acoustic Research) AR-9
|278,000 yen(around the one-set and 1980 time)
The large-sized Tallboy speaker system of the vartical series which also fully
consider up the correspondence to high-output power amplifier, and was designed.
Two 30cm corn type Woofers are adopted as low-pass, and it has
composition arranged on both the sides of the enclosure. Furthermore, the wall
dip phenomenon generated between a speaker and a back wall is canceled because
crossover frequency shall be 200Hz.
inside low-pass -- a 20cm corn type
and a crown -- the unit of a 1.9cm dome shape is carried in the 3.8cm dome shape
and the high region in the region.
The inside low-pass unit is carried in
the subenclosure, and has prevented the mutual intervention in a core.
moreover, a crown -- the "magnetic fruid" of the shape of colloid
which is tinged with the magnetism which NASA developed is put in between
the voice coil of a region / high region unit, and the yoke. And distorted
reduction was aimed at from the central axis as a structure as for which
Bure is not, and the input-proof is improved.
The electronic automatic transmission
developed uniquely is adopted as the network part as an object for low-pass.
This controls the low-pass characteristic automatically electrically like
the missions of an automatic car,Without reducing a low-pass output, it operates
so that dumping may become the maximum with resonance frequency, and even if it
exceeds a bus spectrum about the part beyond resonance frequency, it switches
electrically so that the flat characteristic may be secured.
17AWG sky core coil, a computer class electrolytic condenser, input-proof [ high
] ceramic resistance, etc. are adopted as the use element.
suspension system of AR tradition is adopted as the enclosure.
system, air can achieve the duty of a spring by carrying out full sealing of the
core, compliance can be enlarged, and it is possible to make low-pass resonance
Moreover, the acoustic blanket which is a special
sound-absorbing material was attached to the surroundings of a driver unit, and
sound quality degradation by reflective sound is prevented.
walnut oil finishing.
||4 ways, 5 speaker acoustic suspension system, and a
||For low-pass: 30cm corn type x2
For inside low-pass:
20cm corn type
a crown -- : for regions -- a 3.8cm dome shape
regions: 1.9cm dome shape
||18Hz - 30kHz
|Low-pass play frequency
|Output sound pressure level
||4ohms (a minimum of 3.2ohms)
|The continuation maximum input
|The maximum input
||200Hz, 1.2kHz, 7kHz
Inside low-pass: Three-step
a crown -- region: -- three-step switching
||Width 381x height 1340x depth of 402mm