ขายเครื่องเล่นเทป A&D (AKAI) รุ่น GX-R75CX หัวเทป Super GX รุ่นกลางใหญ่ พร้อมใช้ Made in Japan
ขายเครื่องเล่นเทป A&D (AKAI) รุ่น GX-R75CX หัวเทป Super GX รุ่นกลางใหญ่ พร้อมใช้ Made in Japan
A & D GX-R75CX
¥ 79,800 (around 1987)
Commentary
A cassette deck that pursues higher sound quality and improved operability through quick
reverse.
The Accurate reverse head system which is A & D's original rotation head system is adopted
as a click reverse mechanism. This has acquired smooth rotation and high precision.
The LC-OFC twin field super GX head is adopted as a recording and re-head.
The Super GX head is made by processing ferrite, which has excellent electromagnetic conversion characteristics and dynamic characteristics in the high frequency band, with
high precision using our unique technology. It has been realized. In addition, it has excellent
wear resistance, is resistant to dust adhesion, and maintains excellent initial characteristics
for a long period of time.
In the Twin Field Super GX head, the recording / playback quality equivalent to that of the
3-head system is realized by independently providing a recording / playback gap in the
head housing based on the head having these characteristics.
Furthermore, LC-OFC is adopted as a winding of a core, and the number of crystal grain
boundaries which has a capacitor effect is suppressed to about 1/7,500 compared with
general tough pitch copper. In addition, the rectifying action (semiconductor) of cuprous oxide
(CU 2 O) has the advantage of being a night.
The BSP (Bi-Directional Symmetrical Precision) mechanism is adopted as a mechanism
part.
In the BSP mechanism, the tape transport is almost completely symmetrical, and the
reciprocating tape running characteristics are made uniform. Furthermore, the contact surface
with a tape is made into a wide rounded surface, and the difference in the tape running
characteristic of a reciprocating tape is suppressed by adopting the original dual wide tape
guide which separated and made independent on the left and right of a head.
The recording / replay amplifier is completely DC, and has a circuit configuration that
greatly improves the dynamic characteristics and resolution.
Moreover, the low noise dual FET input operational amplifier is adopted as a reproduction
equalizer amplifier which has a big influence on sound quality, the external phase compensation
is enabled, and the characteristic of high slew rate, low distortion, and low noise which is equivalent to a discrete composition is secured. doing. Furthermore, the reproduction
equalizer amplifier has prevented the deterioration of a signal by direct coupling with a
head.
The twin active power supply is adopted as a power-source part.
The twin active power supply maintains a stable power supply even for current fluctuations in
all bands, achieving low output impedance over a wide band and improving responsiveness
to low-frequency signals that require large currents. ..
It is equipped with a dbx noise reduction system that expands the dynamic range.
Moreover, the Dolby BC NR is also carried, and the high resolution is obtained by the
stabilization circuit only for ± 2 power supplies.
In order to shut out the high frequency noise component generated by the microcomputer
which operates a mechanism, the independent power supply and the EMI (electromagnetic interference) filter are carried, and the interference to a signal system is suppressed.
The thing developed for audio such as FBET (folding electrode transistor), LC-OFC winding,
MPX filter which adopted the low distortion core, and high-quality sound resistance is adopted.
The CRLP (computer REC level processing) system is carried.
Music signal levels are distributed over a wide range of frequencies and are constantly
changing. In CRLP, this changing music signal is checked by a computer, and the recording
level is automatically set according to the ability of the tape (MOL: Maximum Output Level).
When you press the CRLP switch, the CRLP indicator lights up and the recording level is
lowered to the optimum level as long as the high / mid-low range energy of the recording
source does not exceed the high-range MOL / mid-low range MOL of the tape. The electronic
volume that determines the adjustment accuracy is a high-performance type with 65 steps
(1 step = 1 dB, with memory backup). In addition, the value can be read directly by digital
display.
The CRLP system also acts as an auto attenuator during recording, lowering the recording
level by about 1 dB every second so as not to impair the audibility of excessive input.
The recording level can also be set manually.
The direct read-in & power eject mechanism is carried, and a tape is loaded automatically
just by setting a cassette and pressing a desired operation button. In addition, the eject has
a structure unique to A & D that is driven by a motor.
Equipped with an auto fader, you can fade in and out with a single touch.
Fade time can be selected from 2 speeds of 3 seconds and 6 seconds.
Real-time display An electronic digital tape counter is installed, and you can check the
remaining time and playing time of the tape on the minute and second display.
The FL display is adopted as a display, and the peak level meter of 2 colors and 12
segments is adopted as a bar meter.
In addition, you can switch to the spectrum display where you can check the level of the
mid-low range component of the music signal, and at the same time, the high-range MOL
(SOL) and mid-low range MOL (MML) according to the type of tape are displayed on the bar
meter. ..
Harmful vibration and resonance are suppressed by the high rigidity design which adopted
the high-strength bottom plate and the large foot.
The IPLS (automatic cue mechanism) which can cue the next song and the song being played
is carried.
The auto mute mechanism which creates the space between songs for about 4 seconds is
carried.
The auto tape selector which detects the type of a tape automatically is carried.
The MPX filter switch is carried.
The output volume is carried.
The timer start mechanism is carried.
The reverse selector is carried.
Uses gold-plated terminals.
The cord with the polarity display is adopted as a power cable.
Remote control is possible by using an optional remote control unit.
Transport mechanism Twin Field Super GX Head T Accurate reverse system Twin Field
Super GX Head Structure T Block diagram of twin active power supply
Model rating
Model Cassette deck
Wow and flutter 0.05% WRMS
± 0.07% WPeak (EIAJ)
Frequency characteristic 20Hz to 17kHz ± 3dB (normal tape)
20Hz to 18kHz ± 3dB (chrome tape)
20Hz to 19kHz ± 3dB (metal tape)
Distortion rate (EIAJ) 0.8% (metal tape)
Signal-to-noise ratio (EIAJ) 59dB (Metal Tape)
Dolby B NR: 5dB at 1kHz, 10dB improvement at 5kHz and above
Dolby C NR: 15dB at 500Hz, 20dB improvement at 1kHz to 10kHz
Dynamic range 110dB (when using dbx NR system)
head Recording: LC-OFC Twin Field Super GX Head
Erase: Erase Head
motor For capstan drive: Electronically controlled DC servo motor
For reel drive: DC motor
For cam drive: DC motor
Power-supply voltage AC100V, 50Hz / 60Hz
power consumption 23W
External dimensions Width 440 x Height 115 x Depth 280 mm
weight 5.2kg
Attached Connection code
Sold separately Wireless remote control RC-92 (¥ 18,000)
Wired remote control RC-32 (¥ 6,000)
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