Most advanced
technology of cassette deck design
The KX-1030 achieves
electrical and performance characteristics equal to , or better than those of
any cassette deck available today at any price. The extraordinary performance
of this cassette deck is a direct result of the many years of research and development
of dedicated Kenwood engineers, and their desire to achieve a level of
performance that goes far beyond the state-of-the-art..
Consider
just one performance feature of the KX-1030. there exist a number of cassette
decks which incorporate "three-head" design for the purpose of
monitoring recordings directly from the tape as they are being made. The
KX-1030 provides for such instant playback of recordings, but Kenwood engineers have incorporated independent
record and playback heads for this purpose, thereby achieving a performance
level not possible with dual-purpose combination record/playback heads. As a
result, the KX-1030 provides extended frequency response, wider dynamic range
and higher saturation levels - performance qualities that are indispensable for
high quality tape reproduction.
Flat Drive Belt -
the key to further improvement in woa and flutter
The
drive system used to transfer rotational energy from the motor to the flywheel
can be used to further reduce undesirable wow-and-flutter. A round
cross-sectional type of belt, such as that used in most cassette decks, does
not provide sufficient contact surface to be used in a precision cassette deck
such as the KX-1030. in order to reduce slippage and vibration caused by the subtle, irregular motion that takes
place between the flywheel and the drive belt, Kenwood engineers elected to use
a flat belt having a width of 5 millimeters. This belt not only reduces
slippage because of its large contact surface, but also absorbs vibration
caused by the irregular motion inherent in the remainder of the drive system.
Unlike flywheels
with V-grooves gouged into their surfaces, the flat, polished surface of the
flywheel used in the KX-1030 provides exact concentricity required for precise
rotation. Such accurate roundness is difficult if not impossible to achieve
with conventional V-grooved flywheels.
Vertical
Tape Trasport using Independent
Belt Drive System
In
most cassette decks employing a single-motor drive, one belt is used to drive
the tape as well as the take-up reel. In such systems, so long as there is no
tape on the take-up reel side, the capstan drive system operates without
interruption. However, as tape accumulates
on the take-up side, irregularities or "bumps" in the action of the
take-up reel may affect the operation of the capstan drive.
In
order to reduce wow created by such vibration, Kenwood engineers decided to incorporate two separate belts; one
solely for driving the capstan; the other for driving the take-up reel. As a
result of this two-belt system, the KX-1030 provides low wow-and-flutter as
well as accurate and stable rotation of the capstan, regardless of tape
accumulation on the take-up reel of the cassette.
Capstan
Roundness Accuracy
The
capstan used in Kenwood's KX-1030
is machined to the critical roudness tolerance of 0,1 microns, thus reducing
another important cause of wow-and-flutter. The capstan roundness chart ,
indicates clearly the degree of roundness achieved in Kenwood capstans.
Capstan accuracy
must be maintained indefinitely, and not only when the cassette deck leaves the
factory. In order to maintain this built-in accuracy, Kenwood engineers have
incorporated a triangular capstan support system. This three-point support (as
opposed to single or dual-support systems used by other manufacturers) can
withstand shock from any direction without affecting the mechanical stability
of the capstan system. Thus, long term reliability and low wow-and-flutter
performance are assured through many years of continued use.
High Power, High
Torque DC Servo Motor
While
the use of a large flywheel in a cassette deck's transport system contributes significantly to stable and
accurate rotation of that drive system, driving such a heavy flywheel requires
a motor with high rotational torque. Kenwood engineers have incorporated a
motor with a rotational torque of 50 gram centimeters in the KX-1030 - compared with approximately 20 gram centimeters
of torque provided by the motors used in many other cassette decks. Another
important feature of this well designed DC servo motor is that a sudden
increase in load (often encountered in cassette drive systems when
less-than-perfect cassette tape housing are used) has a negligible effect upon
the stability of the tape drive system.
Specifications
Type: Front Loading Stereo Cassette Deck with Dolny
System
Track: 4-track 2-channel Stereo/Mono
Recording/Playback
Recording
System: AC Bias System (Bias Frequency:
85 kHz)
Erasing System: Ac System
Tape Speeds: 4,76 cm/sec (1-7/8 ips)
Heads: Three Ferrite Heads
Recording and
Playback Dual Combination Head x 1
Erasing Head x 1
Motor: Electronically Controlled DC Motor
Fast Winding
Time: Approx. 80 sec. C-60 tape
Frequency Response
Normal Tape : 25 Hz to 17,000 Hz (35 Hz - 15,000 Hz ±3 dB)
CrO₂ Tape : 25 Hz to 20,000 Hz (35 Hz - 18,000 Hz ±3 dB)
Ferri-CrO₂ Tape
: 25 Hz to 19,000 Hz (35 Hz - 17,000 Hz
±3 dB)
Signal-to-Noise
Ratio
Dolby On (over 5
kHz): 65 dB (Normal Tape ): 67 dB (CrO₂ tape)
Dolby Off : 55 dB (Normal tape); 57 dB (CrO₂ tape)
Total Harmonic
Distortion: less than 1,3% (at 1 kHz,
0VU with Normal tape)
Wow and
Flutter: 0,06% (WRMS)
Input
Sensitivity/Impedance
Line x 2 : 77,5 mV/56 k Ω ( or 0,1 mV/1,0 k Ω )
DIN x 1 : 10,9 mV/1,5 k Ω
Microphones x 2 : 0,19 mV/10
k Ω
Output Level/Load
Impedance
Line x 2 : 775 mV (0VU) / 2,0
k Ω
DIN x 1 : 775 mV (0VU) / 2,0
k Ω
Headphones x 1 : 48,9 mV / 8 Ω - 16 Ω
Power
Requirements: AC 120 V 60 Hz (USA,
Canada); AC 220 V , 50 Hz (Australia); AC 240 V, 50 Hz (UK )
Power
Consumption: 13,0 watts
Dimensions (W x H x
D): 430 x 167 x 332 mm (16-15/16"x
6-9/16"x13-1/16")
Weight: 7,5 kg (16,5 lbs)
