|AR(Acoustic Research) AR-90
|198,000 yen(around the one-set and 1980 time)
The Tallboy type speaker system of the vartical series which inherited the main
designs of AR-9 and realized the miniaturization further.
Two 25cm corn
type Woofers are carried in low-pass, and little distorted low-pitched sound
play is realized by installing in enclosure both sides.
The same 20cm
corn type Woofer as AR-9 is carried in inside low-pass.
The natural vocal
play is realized by having prevented the mutual intervention by mounting to the
subenclosure, and also making this unit take charge of 200Hz - 1200Hz which is a
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 same thing as AR-9
is adopted like [ these units ] inside low-pass, the magnetic fruid of the shape
of colloid which is tinged with the magnetism of NASA development was put in
between the voice coil and the yoke, and the input-proof is improved while
aiming at distorted reduction from a central axis as a structure as for which
Bure is not.
A "17AWG sky core coil", a "computer class electrolytic
condenser", "input-proof [ unguided quantity ] ceramic resistance",
etc. are used for the network portion.
The acoustic suspension system of AR tradition is
adopted as the enclosure.
By this 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 frequency lower.
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
Finishing is walnut oil finishing.
||4 ways, 5 speaker acoustic suspension system, and a
||For low-pass: 25cm corn type x2
For inside low-pass:
20cm corn type
a crown -- : for regions -- a 3.8cm dome shape
regions: 1.9cm dome shape
||23Hz - 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 switching
mid-high range: three-step switching
High region: Three-step switching
||Width 368x height 1102x depth of 386mm