ขายเครื่องเล่นเทป AIWA รุ่น XK-S9000 ระบบ 3 หัวเทป รุ่น Top สภาพสวยหายาก เสียงดีมาก Made in Japan
ขายเครื่องเล่นเทป AIWA รุ่น XK-S9000 ระบบ 3 หัวเทป รุ่น Top สภาพสวยหายาก เสียงดีมาก Made in Japan
AIWA XK-S9000 ¥ 135,000 (around 1991)
Commentary
A reference cassette deck developed for the best sound quality.
Uses Dolby S type as a noise reduction system.
The Dolby S Type is a noise reduction system that optimizes the Dolby SR (spectral recording)
for professionals used in recording studios for commercial cassettes. It achieves a noise
reduction effect of up to 10 dB in the low-frequency range and up to 24 dB in the high-frequency
range. It also achieves natural high sound quality without the pumping (dynamic side effect) that
is often found in conventional NR.
Dolby Type S is acoustically compatible with Type B, so it can be played on a cassette
deck equipped with Type B.
Equipped with Super AMTS (Super Anti Modulation Tape Stabilizer) to prevent tape vibration completely.
Super AMTS is an advanced version of AMTS, which is Aiwa's unique stabilizing mechanism.
The cassette box inherits the two layer structure of non-magnetic aluminum plate and non-resilient
rubber, while increasing the pressure applied to the surface of the half body from 1 kg to 1.5 kg.
In addition, the back side is bonded with non-resilient rubber with different properties to further reduce vibration.
In addition, the capstan motor, which is the source of vibration inside the deck, is supported by
two 3-layer damping steel sheets and special damping rubber and floating. In addition, the
mounting of the recording and reproducing heads has been strengthened from 2-point support
to 3-point support, and the heads are precisely fixed to the heavy head block. In addition,
a head stabilizer, which dumps from both sides with non-resilient rubber, is also installed.
These structures realize a thorough vibration control mechanism and further improve
sound quality.
It is equipped with BTOR (Blank Tape Optimized Recording) system which is a recording
position only for raw tapes.
In conventional cassette decks, even when recording on a tape that has never been used,
it passes through the erasing head and affects the signal system due to the erasing current.
We are working to improve the sound quality by improving this BTOR.
Equipped with a real 18-bit linear dual D/A converter, it can be directly connected from
digital source to digital.
The D/A converter section has an independent dual configuration dedicated to the left and
right channels. Mutual interference is eliminated by adopting a completely independent
power supply system consisting of windings dedicated to the D/A converter, independent
rectification circuits for digital and signal systems, and independent power supply circuits.
In addition, the digital part is isolated by a dedicated shield case to reduce the influence on
the audio system. In addition, an ON/OFF switch that can stop all digital clocks is also installed.
A stress-free 6N wound pure amorphous head is used for the recording and reproducing
heads.
In order to achieve high sound quality, ultra-high-purity copper with a Stress free-6Nines purity
of 99.99997% or higher is used for the head winding regardless of the cost. LC-OFC and
PC-OCC used copper with a purity of 99.99% or higher called 4Nines, but with 6N, impurities
are reduced from 100 ppm to 1 ppm, eliminating distortion of atomic arrangement and suppressing
disturbance of electron flow.
The head core uses a 12-layer laminated pure amorphous head with extremely high magnetic
flux density, which has excellent characteristics as an audio magnetic head.
Sendust material is used for the erasing head.
Compared to a single capstan, the dual capstan mechanism has a higher constant tape
tension and a higher degree of adhesion between the tape and the head. Therefore, when an
ordinary ferrite material is used for an erase head or a read / write head, the high frequency
degradation of the tape signal is caused by the spontaneous magnetization effect associated
with the coercive force = Hc (0.1 to 0.15) of the ferrite material.
The use of a Sendust erasing head with a very low Hc of 0.007 ~ 0.02 prevents degradation of
the sound quality of the tape.
A 4-motor closed-loop dual capstan mechanism is used for the mechanism.
The left and right capstan and right capstan, for FF and REW, and for recording and playback
are independent, and a low cogging mechanism driven by a belt drive developed from the idea
of an analog thread drive player is adopted. The other motor is used for driving the Super AMTS
and cassette box.
In addition, the capstan uses Aiwa's unique micrograin processing frequency-dispersion type
with less tape damage. Together with high-precision flywheels with precise dynamic balance
each piece, the capstan achieves a wow and flutter of 0.018%.
A vibration control mechanism has been adopted. In addition to a heavy-weight high-rigidity
chassis and cabinet, a resonance damping wood base with a dense coniferous MDF board
has been adopted at the bottom to reduce external vibration. In addition, a vibration damping
type with fast vibration damping characteristics has been adopted for the printed circuit board.
We also pay attention to the micro vibration caused by the power transformer, and have installed
a large power transformer of anti-vibration and anti-magnetic type externally.
We are also pursuing vibration control with heavy-weight insulators, head stabilizers,
bias-shielded head blocks, and three point support high-rigidity head bases.
As much as possible, electronic switches, switching circuits, connectors, and printed patterns
that cause sound quality degradation are eliminated, and simple and straight signal
transmission is achieved.
In addition, it is equipped with a transmission mechanism that does not degrade sound
quality when turned off, such as an MPX circuit with through position and an open-type
muting circuit with gold-plated relay during performance.
The digital, mechanical logic, display, signal, and Dolby S NR printed circuit boards are
separated from each other and placed at sufficient intervals to eliminate mutual interference.
The mechanical logic system and the display system are isolated by an internal chassis
to eliminate interference with the signal system. In addition, the printed circuit board for the
D/A converter is isolated by a dedicated shield case.
It is equipped with manual calibration to extract the tape performance, and the built-in oscillator
is set to 400 Hz and 10 kHz for wide frequency response adjustment.
In addition, since the level meter is expanded to 0.5 dB steps during calibration, highly
accurate calibration is possible.
You can set a three stage recording equalizer to suit the recording source and tape.
The High setting focuses on the low-range MOL (Maximum Output Leve), the Norm setting is
the standard setting, and the Low setting focuses on the high-range MOL.
Low output impedance power source with discrete configuration is adopted.
PC-OCC OCC low-capacity head wire and is directly attached to the playback equalizer.
A PC-OCC wound trap coil using a low distortion core is adopted.
Equipped with discrete Dolby HX Pro circuit capable of ON/OFF.
Equipped with ultra-low distortion factor Dolby NRIC.
Equipped with high-precision detent catalogue sound volume.
Uses a special 3-layer structure large metallized polyester film condenser.
Uses OFC thick power cord with polarity display.
OFC radiator plate and copper plated radiator plate are adopted.
Low contact resistance type input / output pin jack with gold plating is adopted.
Uses high-quality sound condenser and high-precision parts.
The headphone jack uses a gold-plated terminal.
Three nitrogen gas sealed relays are used.
It uses an auto loading type cassette door and closes automatically when the cassette is inserted.
Equipped with a super bias circuit.
Equipped with a low-noise microphone amplifier with gain switching.
Equipped with 3-mode display ON/OFF switch, clock stops when OFF.
A low-distortion oscillator output can be used to calibrate other decks or to check the phase of speakers.
Quick response AI mechanism is adopted.
Equipped with a linear counter with pre-end winker.
It is equipped with a large FL multi-mode display and a peak meter with 24 segments x2ch peak hold (Auto/Manual Resetable).
Uses heavyweight side wood with UV coating.
Wireless remote control is included.
Mechanical block equipped with super AMTS Dual structure cassette box Flywheel Head block
Internal structure Power transformer Floating mount system Non-resilient special rubber
Open type muting circuit during performance MPX circuit with through position Pure amorphous
head Capstan motor PC-OCC wound trap coil Detent catalogue sound volume OFC heat sink
Low contact resistance type gold-plated terminal High sound quality condenser High sound
quality condenser Special 3-layer metalized polyester film capacitor Precision Parts Precision
Parts Vibration control mechanism Attached remote control
Model Rating
Type Stereo cassette deck
Heads Recording : Stressfree-6N Winding Pure Amorphous Head
Playback : Stressfree-6N Winding Pure Amorphous Head
Erasing : double-gap sendust heads
Motor For Capstan : Mu-Flat DC Servo Motor
For Playback / Recording Winding : DC Motor
For FF/RWD : DC Motor
For Super AMTS / Cassette Door : DC Motor
Wow flutter 0.018% (W / Peak)
± 0.035% (WRMS)
Frequency Response (-20dB Recording) LH : 13 Hz ~ 21 kHz ± 3 dB
CrO2 : 13 Hz to 22 kHz ± 3 dB
Metal : 8 Hz to 27 kHz -10dB
13 Hz to 24 kHz ± 3 dB
SN ratio (peak level) 65 dB (NR off, metal tape)
87 dB (Dolby S NRon, metal tape)
External dimensions Width 469x Height 151x Depth 415 mm
Weight 14.0kg
Attachment LC-OFC Gold Plated Pin Cord x2
Remote controller
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