JVC L-A31 turntable

Auto-Return Direct -Drive Turntable

Features

Cog-free coreless DC servo motor

FG direct-drive system

Low-mass straight tonearm

Up-front controls

Auto return convenience and pitch control

 

Sharing many features with JVC's more advanced turntables is the L-A31. like every other JVC turntable, it has the JVC-exclusive cog-free coreless DC servo motor to smooth rotation and deliver high torque, and our FG direct-drive system to maintain speed accuracy. Rotational speed is constantly adjusted against any variations, whatever the cause. Our low-mass straight tonearm is consistent with current thoughts on the subject; low-mass improves tracking, allowing the use of even quality high-compliance cartridges. Its straight design further reduces mass and increases rigidity. Resonance is optimally just above warp frequencies while remaining below audible frequencies and our ultra-light non-resonating headshell is included. Operation is simple, convenient and smooth. Controls are up-front, outside the closed dust cover - even arm cueing. Cueing and end-of-play auto return are two amenities added to protect records and stylus. Record handling is reduced to a minimum. Other features are the built-in strobe and a pitch control for "tuning" your records. We're sure that feature for feature and spec for spec, there isn't a finer turntable available.

 

Specifications:

Motor

Type :  Coreless DC servo motor

Drive System :  Direct-drive system

Wow and Flutter:  0,03% (WRMS); 0,05% (DIN)

Signal-to-Noise Ratio:  75 dB(DIN-B)

Platter:  295 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced arm on Tracking Hold system

Effective Length:  220 mm

Tracking Error:  +3°35', -0°43'

Overhang:  15 mm

Tracking Force:  0 - 3g (o,1 steps)

Cartridge Weight (Headshell Included):  8,5 - 12,0 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 355 mm (16-9/16" x 4-1/2" x 14")

Weight:  5,2 kg (11,4 lbs)

 

JVC L-A21 turntable

 

Auto-Return Belt-Drive Turntable

Features:

Quiet and accurate belt-drive

Precision synchronous motor

Low-mass straight tonearm

Up-front controls

Auto return convenience

 

The design objectives for our lowest cost turntable were for the most performance and features at a price easily accessible to anyone. Check the features and specifications of the L-A21 and you'll agree that we met all our design objectives. Our reliable belt-drive system eliminates vibration and noise and promotes smooth platter rotation. And our motor is an advanced synchronous type - impervious to changes in line voltage. Our tonearm, like those found on our more expensive models, is of a low-mass design for high tracking and low distortion while its straight tube design reduces spurious movement of the arm due to dynamic torsion. Our special headshell is non-resonant yet extremely rigid. We've also included a cueing device and the auto return mechanism. Like all its operating controls, the cue button is outside the closed dust cover so there's little chance of nudging the tonearm and damaging record or stylus . All in all, a great bargain at any price.

 

Specifications:

Motor

Type :  4-pole synchronous motor

Drive System :  Belt-drive system

Wow and Flutter:  0,08% (DIN)

Signal-to-Noise Ratio:  63 dB(DIN-B)

Platter:  300 mm die-cast aluminum alloy

Tonearm

Type:  Statically-balanced straight arm

Effective Length:  220 mm

Tracking Error:  +4°, -0°48'

Overhang:  15 mm

Tracking Force:  0 - 3g

Cartridge Weight (Headshell Included):  8,5 - 11,5 g

Operation Mode:  Auto-return

General

Dimensions (W x H x D):  420 x 115 x 350 mm (16-9/16" x 4-1/2" x 14")

Weight:  4,5 kg (9,9 lbs)

JVC CD-1770 cassette deck

For people who prefer to place their decks on an open shelf or table, the CD-1770 has the time-tested top-load design. Its reliable tape transport mechanism offers a low wow and flutter of only 0,12% (DIN 45 500) or 0,04% (WRMS). JVC's own ANRS/Super ANRS noise reduction systems. SA (Sen-Alloy) record/playback head, 5-LED Multi-Peak indicator and other numerous technical features assure exceptional versatility and dependable performance.

 

Finest Tape Transport.

The exceptionally low 0,12% (DIN 45 500) wow and flutter in this fine deck is mainly credited to the use of a frequency controlled DC servomotor. It provides more stable and higher torque and less speed deviation than AC-operated motors. A dual-belt independent Drive Mechanism, another JVC-exclusive is also used to drive the capstan and the tape reels separately, thus preventing the vibration of the tape reels from affecting the capstan revolution. This further assures exceptional speed accuracy at all times.

 

Versatile Recording Aids

The CD-1770 offers JVC's 5-LED Multi-Peak Indicator in Addition to a pair of large level meters. This Indicator responds even to pulse-like peak signals of very short durations. Using the indicator and the level meters together will enable you to adjust the recording levels to the maximum and avoid distortion. There also are two pairs of recording level controls for MIC (DIN) and Line, to let you mix microphone signals with line inputs from any programme source of your choice.

Convenience Features

Memory Tape Counter for memory stop. Air-damped cassette compartment lid. Full automatic stop, illuminated cassette compartment for easier tape inspection Six push-button Bias and Equalizer selectors to obtain maximum performance from any kind of tape. Timer Standby facility.

 

Specifications

Heads:

Record/Playback :  Sen-Alloy Head

Erase :  Two-Gap Ferrite Head

Motor:  Frequency-Controlled  DC Servo Motor

Fast Forward / Rewind Time:  75 sec. (with C-60 cassette)

Bias and Erase System:  AC-95 kHz

Frequency Response  (typical)

Chrome Tape :  30 - 16,000 Hz

Normal Tape :  30 - 16,000 Hz

Signal-to-Noise Ratio:  56 dB (from Peak Level Weighted) without ANRS. The S/N is improved by 5 dB at 1 kHz and 10 dB above 5 kHz with ANRS on

Wow and Flutter:  0,04% (WMRS); 0,12% (DIN 45 500)

Crosstalk:  65 dB (1 kHz)

Channel Separation:  35 dB (1 kHz)

Total Harmonic Distortion :  1,2%

Input Sensitivity/Impedance

Mic  :  0,2 mV/600 - 10 k Ω

Line In  :  80 mV/470 k Ω

DIN :  0,17 mV/k Ω 

Output Level/Impedance

Line Out  :  0-500 mV/6.8 k Ω

Headphone :  0-0,3 mW / 8 - 1 k Ω

DIN :  0-500 mV/6.8 k Ω

Power Supply:  120 / 220 / 240 V, 50/60 Hz

Power Consumption:  5 watts

Dimensions (W x H x D)):  426 x 126 x 277 mm (16-3/4" x 4-15/16" x 10-7/8")

Weight:  5,5 kg  (12,1 lbs)

 

JVC KD-720 cassette deck

Features:

Separate Bias/EQ Switches

Full Automatic Stop Mechanism

Slanted Operation Panel

A High Value Investment in Hi-Fi

The Dolby noise reduction system, a popular and widely used feature, is incorporated in the JVC KD-720 to effectively reduce tape hiss. Then, since we provide separate Bias/EQ Tape Select switches on this high-value deck, you are assured of an outstanding dynamic range and a wide frequency response from any tape you use.

For tape protection, the KD-720's Full Auto-Stop mechanism automatically shuts itself off several seconds after a tape reaches its end in any mode. Reliability and durability are much improved over those of conventional mechanical type stop devices. This new and special JVC mechanism uses a reed switch and a rotating magnet.

The control panel is slanted to facilitate operation and improve visibility of VU meters, controls and tape running Level controls are easy-to-adjust sliders, while Vus are large for easy adjustment.

 

Specifications

Heads:

Record/Playback :  Cronios Head

Erase :  Two-Gap Ferrite Head

Motor:  Electronic Governor DC Motor

Fast Forward / Rewind Time:  85 sec. (with C-60 cassette)

Bias and Erase System:  AC-95 kHz

Frequency Response  (typical)

Chrome Tape :  40 - 15,000 Hz

Normal Tape :  40 - 14,000 Hz

Signal-to-Noise Ratio:  56 dB (from Peak Level Weighted) without Dolby. The S/N is improved by 5 dB at 1 kHz and 10 dB above 5 kHz with Dolby on

Wow and Flutter:  0,07% (WMRS); 0,17% (DIN 45 500)

Crosstalk:  60 dB (1 kHz)

Channel Separation:  35 dB (1 kHz)

Total Harmonic Distortion :  1,3%

Input Sensitivity/Impedance

Mic  :  0,4 mV/600 - 10 k Ω

Line In  :  80 mV/470 k Ω

DIN :  0,14 mV/k Ω 

Output Level/Impedance

Line Out  :  390 mV/4 k Ω

Headphone :  0,3 mW / 8 - 1 k Ω

DIN :  390 mV/4 k Ω

Power Supply:  120 / 220 / 240 V, 50/60 Hz

Power Consumption:  5 watts

Dimensions (W x H x D)):  390 x 128 x 250 mm (15-3/8" x 5" x 10")

Weight:  3,6 kg  (8 lbs)

 

JVC DD-9 cassette deck

Direct-Drive Cassette Deck. The Performance Approaching Open-Reel Quality

The JVC DD-9 is truly a deck worthy to be termed "professional", if there ever was one. Thanks to our own JVC-manufactured quartz-lock Pulse Servo motor, we've succeeded in practically eliminating wow/flutter; it's only 0,055% (DIN 45 500), the lowest figure ever achieved in a consumer cassette deck. This and other features help you get the highest level of performance - open-reel quality recording performance - from the compact cassette format.

Direct-Drive plus quartz-lock Pulse Servo motor equals (0,055% wow/flutter)

By linking our capstan directly to the motor shaft, we've eliminated all the linkages - belts, cams, pulleys, etc. - found in lesser decks that can create unwanted speed variations known as Wow and Flutter. The low-rpm motor, designed and manufactured by JVC, is used for capstan drive, it has completely eliminated tiny rotational fits and starts known as "cogging" that can audibly tarnish musical reproduction. A quartz-referred servo circuit has been added so that absolute speed accuracy is impeccable.

Computerized B.E.S.T. tuning system - the matchmaker

You can obtain flat response from 40 to 12,500 Hz with a tolerance of only ±1 dB, using just about any tape, all at the touch of a button. The built-in computer matches deck parameters - bias, equalization, and sensitivity - for each specific tape. Distortion and dynamic range are both optimized.

 

 Three-head design specially configured for B.E.S.T.

As you tune the deck to the tape, you can actually attest to the system's effectiveness, for the DD-9 has separate record and play heads (JVC X-cut SA combination Rec/Play heads), allowing you to monitor the tape while you're recording. You can also witness the unusually extended highs, for each head is given an optimized gap.

Dolby C-type noise reduction: Inaudible hiss and distortion free "hot" passages

The newest circuitry from Dolby Laboratories is incorporated in the DD-9 - Dolby C-type noise reduction. At high frequencies, noise (hiss) is reduced by an additional 10 dB (to a full 20 dB of noise reduction)

Two-colour digital fluorescent level meters with peak-hold function.

They are electronically accurate and have a peak-hold function so that instantaneous transients may be analysed for proper level setting during recording.

Other features:

Two-motor full-logic control transport

Touch input volume control

Convenient Memory and Auto Rewind functions

DC amps

Lockable timer standby

Output level control adjusts headphone level as well

Recording mute, Output level control, Optional remote control (R-50E)

 

Specifications

Type: Compact cassette tape deck, 2-channels stereo

Heads:

Record/Playback :  Combination X-Cut Sen-Alloy Head

Erase :  Two-Gap Sen-Alloy Head

Motors:  Quartz-Lock Pulse Servo Motor and DC Motor

Fast Forward / Rewind Time:  85 sec. (with C-60 cassette)

Frequency Response  (at -20 VU)

Metal Tape :  25 - 18,000 Hz (±3 dB) [40 - 12,500 Hz ±1 dB]

SA/Chrome Tape :  25 - 18,000 Hz (±3 dB) [40 - 12,500 Hz ±1 dB]

Normal Tape :  25 - 17,000 Hz (±3 dB) [40 - 12,500 Hz ±1 dB]

Frequency Response  (at 0 VU)

Metal Tape :  25 - 12,500 Hz (±3 dB)

SA/Chrome Tape :  25 - 8,000 Hz (±3 dB)

Signal-to-Noise Ratio:  60 dB (Metal)

Wow and Flutter:  0,055% (DIN 45 500)

Crosstalk:  65 dB (1 kHz)

Channel Separation:  40 dB (1 kHz)

Total Harmonic Distortion (0 VU, 1 kHz) :  1,0% (Metal)

T.H.D. K3 (0 VU, 1 kHz) :  0,4% (Metal)

Input Sensitivity/Impedance

Mic (x2) :  0,2 mV/600 - 10 k Ω

Line In (x2) :  80 mV/100 k Ω

Output Level/Impedance

Line Out (x2) :  0 -500 mV/5 k Ω

Headphone :  0 -0,6 mW (Matching Impedance 8 - 1 k Ω )

Power Supply:  120 / 220 / 240 V, 50/60 Hz

Power Consumption:  40 watts

Dimensions (W x H x D)):  450 x 110 x 325 mm

Weight:  8,4 kg

 

JVC KD-95 cassette tape deck

The best of JVC's new lineup of high-performance cassette decks, the KD-95 features nearly all the JVC exclusives introduced on preceding pages. Its electronics and mechanism are truly sophisticated and provide the widest dynamic range, lowest distortion and least noise yet achieved in a stereo cassette configuration. Its outstanding specifications are ample evidence of a JVC engineering triumph.

 

Mechanical Accuracy

The JVC KD-95 employs two motors - a precision frequency-generator (FG) servomotor for capstan drive and a DC motor for reel drive, all operations are undertaken electronically by the JVC developed TTL (Transistor-Transistor Logic) IC which activates three electromagnetic plungers; a light touch of any control button allows you to move from one mode to another without having to go through Stop. Also, the deck's large flywheel - 80 mm in diameter - is coupled to the capstan to help reduce wow and flutter. And finally, a professional touch has been added to the KD-95; its head assembly has screws which allow the user to adjust the head azimuth, height and tilt.

 

Sophisticated Electronics

We used the best of JVC electronics technology in designing our top-of-the-line KD-95. first, its recording amp is formed of the 2-stage direct-coupled NPN configuration featuring high linearity. Second, its equalized circuit is of the DC feedback type for excellent transient characteristics and unmuddiet lows. Third, convenient Recording Equalizer and 400 Hz Signal Oscillator circuits are included.

 

Recording Conveniences

Inn JVC's "Real Time" pause mechanism, the heads are in contact with the tape even in the pause mode. The Timer Standby facility inside the KD-95 permits repeated, interrupted record and play - a feature rarely found on cassette decks. Also offered are two recording circuits, one for Mic/DIN input and the other for Line input, which allow you to mix microphone sounds with other sources. Plus a pair of rack-mounting brackets, which is a standard accessory in every KD-95.

 

Specifications

Type:  Stereo cassette deck

Track System:  4-track, 2-channel

Cassettes:  C-30; C-60; C-90

Frequency Response:

Chrome Tape

Nominal :  20 - 18,000 Hz

Typical :  30 - 16,000 Hz

SF Tape

Nominal :  20 - 17,000 Hz

Typical :  30 - 15,000 Hz

Signal-to-Noise Ratio:  56 dB (from peak level, weighted)

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with ANRS On

Effect of ANRS (Normal Tape)

Improvement of SN :  the same with ANRS

Improvement of Frequency Response :  6 dB at 10 kHz (0VU recording); 12 dB at 10 kHz (+5VU recording)

Improvement of Distortion : 3% at 10 kHz (0VU recording)

Wow and Flutter:  0,05% (WRMS); ±0,2% (DIN 45500)

Crosstalk:  65 dB

Harmonic Distortion:  1,2 %

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Heads:

Recording/Playback :  Sen-Alloy head

Erasure :  Double gap, Ferrite head

Motors:

1 x FG servo DC motor

1 x DC motor

Tape Speed:  4,8 cm/sec

Fast Forward and Rewind Time:  90 sec. With C-60 cassette

Playback Equalizer Time Constant

Normal/SF Tape :  3180 µs/ 120 µs

CrO₂ Tape :  3180 µs/ 70 µs

Semiconductors:  8 ICs; 88 Transistors;  71 Diodes

Input Terminals

Mic Jack (sensitivity/Impedance):  0,2 mV/600 Ω  - 10 k Ω

Input Jack (level/impedance) :  78 mV/100 k Ω

Output Terminals

Output Jack (level/Impedance) :  0 - 0,5 V / 2 - 7 k Ω

Matching Load Impedance :  50 k Ω  or more

Headphone Jack (level/impedance) :  0,6 mW/ 8 Ω  - 1 k Ω

DIN Socket

Min. Input Level :  0,1 mV /k Ω

Input Impedance :  11 k Ω

Output Level :  0 - 0,5 V

Output Impedance :  2 - 7 k Ω

Matching Load Impedance :  50 k Ω  or more

Power Requirements:  AC 100, 120, 220, 240 V 50/60 Hz

Power Consumption:  35 W

Dimensions (W x H x D):  420 x 211 x 321 mm (16-1/2" x 8-1/4" x 12-5/8")

Weight:  11 kg (24,2 lbs)

 

JVC SK-55 loudspeakers

JVC Dynamic Hi-Fi Superfine Tri-Speaker System

Here is good speaker . 10" Woofer 3-way speaker system. The JVC model SK-55 3-Way 3-Speaker acoustic suspension speaker system offers you extended frequencies and power ranges to help satisfy the needs of the most critical requirements.

Woofer Characteristics

The 10" rolled free edge woofer uses a Kurt Muller cone paper made from strictly selected material. It reproduces a very deep and rich bass together with a unique Sandwich Edge coated with plastic on both sides

Midrange Speaker

The 3,5" Midrange speaker, also, has the Kurt Muller cone paper. The cone is supported by a ring of glass wool and the center  cap is coated with a special plastic dampener. These combined features produce a sound with good transient and smooth response to cover a wide listening angle.

Damperless Tweeter

The tweeter is a newly developed "Air Suspension Damperless Speaker" and has a very special light diaphragm and voice coil to produce a sharp and clear high frequency sound with good transient response. Also, the beautifully designed diffuser is used for wide dispersion of the sound.

Power Handling Capacity

The power capacity of the combined SK-55 speaker units is a guaranteed 110 watts peak and 55 watts rms.

Controlable High Frequency Response

The built-in continuously variable level control lets you adjust the frequency response in the high frequency range so as to meet the acoustic conditions of your room or to satisfy your preference.

Cabinet Design

The well designed acoustic suspension enclosure has a 1-piece detachable front panel for your convenient adjustment of the tweeter response or to give an idea of visible sound. The cabinet is of beautiful walnut grained vinyl on a particle board that blends nicely with your furniture.

 

Specifications

Type:  3-way, 3-speaker acoustic suspension system

Speakers

1 x 250 mm (10") free edge woofer with Kurt Muller cone paper

1 x 90 mm (3-1/2") mid- range with Kurt Muller cone paper

1 x 60 mm (2-1 \2") cone tweeter

Power Handling Capacity:  100 W (peak), 55 W (RMS)

Frequency Response:  35 - 20,000 Hz

Impedance :  8 Ω

Sound pressure:  91 dB at 1 m

Crossover Frequency:  2,000 Hz; 8,000  Hz

Front Grille:  Dark Brown, removable

Dimensions (W x H x D):  304 x 540 x 235 mm (12" x 21-1/4" x 9-1/4")

Weight:  9,5 kg (21 lbs)

 

JVC SK-33 loudspeakers

JVC Hi-Fi Quality SK -33 Speaker System, Efficient and beautiful.

This latest JVC SK-33 beautiful and efficient 50 peak watts , 2-way, 2-speaker acoustic suspension system gives you those fully rich highs, mids and deep lows of marvellous sounds as well as allowing you a choice of beautifully designed cabinets with detachable and replaceable front grills in two gorgeous red or brown colors.

Woofer

The JVC specially designed 200 mm rolled free adge and high elastic woofer produces a full frequency range of powerfully deep bass sounds.

DU Paprer Cone

Kurt Muller 's special cone paper us used to reveal high tonal quality, high elasticity, low distortion as well as rich and powerful lows. It is regarded as the best cone paper in the world.

Voice Coil

The flexible woofer's strong , long traveling aluminum bobbin voice coil is connected to the paper cone using a thermosetting adhesive which enables it to withstand a strong input power of 50 peak watts.

Acoustic Suspension Enclosure

The exceptionally well designed and sturdy cabinet has rugged acoustical materials assuring powerfully clear highs and deep distinctive lows. It fits into any place in a room and blends nicely , with the furniture.

 

Specifications

Type:  2-way, 2-speaker acoustic suspension system

Speakers

1 x 200 mm (8") free edge woofer with Kurt Muller cone paper

1 x 50 mm (2") cone tweeter

Power Handling Capacity:  50 W (peak), 25 W (RMS)

Frequency Response:  40 - 20,000 Hz

Impedance :  8 Ω

Sound pressure:  91 dB at 1 m

Crossover Frequency:  3,000 Hz

Front Grille:  Red or Dark Brown, removable

Dimensions (W x H x D):  253 x 456 x 205 mm (9-15/16" x 17-15/16" x 8-1/16")

Weight:  5,2 kg (11,5 lbs)

 

JVC KD-25 cassette tape deck

Stereo Cassette Deck

Features:

3-position Bias/Equalizer Switches

Low Wow and Flutter of 0,15% (DIN 45 500)

Automatic Input Selector

Gear/Oil- Damped Cassette Lid

Tape Illumination

 

The KD-25 is a near-duplicate of the KD-55, but is priced substantially less. But unlike other decks in the same price range the KD-25 features low wow and flutter. This JVC economy-priced deck with Dolby system is well worth the investment of a listen at your nearest dealer's showroom.

Easy to Use Facilities

Cassette mode buttons of the KD-25 are serrated and flat for easy, sure grip. Plus; The JVC 5-LED peak Indicator warns you of imminent saturation distortion; and VU meters are extra-large for high visibility.

Accurate Tape Transport

Tapes are unspotted by a precision-finished capstan (ground to a roundness of 0,1 µ), which is coupled to a large, dynamically balanced, 80 mm flywheel, driven by a precision ground belt.  It contributes to the low wow/flutter and high s/s of the KD-25.

 

Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Frequency Response: 

SA/CrO₂ : 40 - 15,000 Hz (Typical)

Normal :  40 - 14,000 Hz (Typical)

Signal-to-Noise Ratio :  56 dB (from Peak Level, Weighted) without  Dolby

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby on.

Wow and Flutter:  0,06% (WRMS); 0,15% (DIN 45 500)

Crosstalk:  65 dB at 1 kHz

Channel Separation:  35 dB at 1 kHz

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Heads: 

Recording/Playback :  SA (Sen-Alloy) head

Erase: Two-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Motors:  Electronic DC motor

Tape Speed:  4,8 cm/sec

Fast Forward/Rewind Time:  80 sec with C-60 cassette

Bias and Erase System:  AC-95 kHz

Input Sensitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

DIN :  0,1 mV/ 10 k ohm

Output Level/Impedance

Line :  410 mV/3 k Ω

Headphone :  410 mV/3 k Ω 

DIN:  0,3 mW/8  Ω  - 1 k Ω

Power Requirements:  AC 240/220/120 V 50/60 Hz

Power Consumption:  11 W

Dimensions (W x H x D):  420 x 149 x 264 mm (16-9/16" x 5-7/8" x 10-7/16")

Weight:  5,0 kg (11,0 lbs)

 

JVC KD-55 cassette tape deck

Stereo Cassette Deck

This model is the best buy in JVC's line of high-performing hi-fi cassette decks. Its basic parameters are impressive: Frequency Response from 30 to 16,000 Hz with Chrome, wow/flutter of 0,15% (DIN 45 500) and Signal-to-Noise Ratio of better than 56 dB (ANRS off). If you're shopping for a medium-priced, high-performance deck, the KD-55 is a likely candidate for your stereo system.

Accurate Tape Transport

Like more expensive JVC cassette decks, the KD-55 employs a precision frequency generator (FG) servomotor to drive its capstan and reels in the advanced JVC drive configuration. The FG motor is renowned for its rotational accuracy independent of temperature changes, and simplified and advanced system has dramatically improved the stability and reliability of JVC cassette decks. Other KD-55 features to reduce wow and flutter include a large 80 mm -in-diameter dynamically balanced fly-wheel and a capstan shaft precision ground to a roundness of 0,1 µ.

Flattest Response from Any Tape

To solve the problem caused by improper bias and equalization, JVC has equipped the KD-55 with two 3-positioned tape switches - one for bias setting and the other for equalization. By properly adjusting these switches, you can get a natural and flat response from any type of tape, whether you prefer ferric, chrome or ferrochrome types. Another JVC feature included in the medium-priced KD-55 is a Recording Equalizer Switch which allows you to fine-adjust the high frequency response of your deck to compensate for variable tape sensitivities.

 

Easy One-Touch Recording Level Setting

You can set recording levels simply by pushing the Record button. On decks without this facility, you would have to push the Pause button and then the Record and Play buttons together

Features for Wider Dynamic Range

Super ANRS (Automatic Noise Reduction System) is a JVC exclusive that makes tape hiss virtually inaudible. And in addition to eliminating high-frequency noises during "silent" periods, the Super ANRS expands your deck's high-frequency dynamic range; high hats and tambourines, for example, won't sound cramped or distorted. Also, because the Super ANRS circuit is contained in an IC (Integrated Circuit), its long-term reliability is assured. Indeed, with the JVC combination of Super ANRS, a 5-LED Peak Indicator and large VU meters, you can produce undistorted, professional quality recordings instantly.

Unparalleled Ease of Operation

Three features dramatically enhance the ease of operation of the KD-55. one is the JVC-exclusive Gear/Oil-Damped Cassette Lid; it assures smooth, noise-less lid movement. The second is the unique Automatic Input Selector. With it selection priority is given first to Mic, then DIN and then Line inputs; you enjoy recording of a high Signal-to-Noise Ratio. Finally, the Output Volume Control lets you adjust the deck's output level with that of a tuner, etc.

 

Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Frequency Response: 

SA/CrO₂ : 30 - 16,000 Hz (Typical)

Normal :  30 - 15,000 Hz (Typical)

Signal-to-Noise Ratio :  56 dB (from Peak Level, Weighted) without  Dolby

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby on.

Wow and Flutter:  0,05% (WRMS); 0,14% (DIN 45 500)

Crosstalk:  65 dB at 1 kHz

Channel Separation:  35 dB at 1 kHz

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Heads: 

Recording/Playback :  SA (Sen-Alloy) head

Erase: Two-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Motors:  Frequency-Controlled DC Servo motor

Tape Speed:  4,8 cm/sec

Fast Forward/Rewind Time:  80 sec with C-60 cassette

Bias and Erase System:  AC-95 kHz

Input Sensitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

DIN :  0,1 mV/ 10 k ohm

Output Level/Impedance

Line :  0-500 mV/3 k Ω

Headphone :  0-500 mV/3 k Ω 

DIN:  0,5 mW/8  Ω  - 1 k Ω

Power Requirements:  AC 240/220/120 V 50/60 Hz

Power Consumption:  11 W

Dimensions (W x H x D):  420 x 149 x 264 mm (16-9/16" x 5-7/8" x 10-7/16")

Weight:  5,6 kg (12,3 lbs)

 

JVC KD-21D cassette tape deck

This easy-to-afford KD-21D shares many of the features of other, more expensive JVC decks. Among its noteworthy features are the 5-LED Peak Indicator, Timer Standby Facility, Dual-Ball Cassette Hold System.

Every circuit and every control is designed for the cleanest, most musical recording and playback.

The KD-21D thus offers high-quality specifications such as 56 dB Signal-to-Noise Ratio to guarantee long years of musical enjoyment. Add this high-performance deck to your present audio system to make it complete.

 

Dolby Noise Reduction

If you're familiar with tape recording, so must you be with this useful feature. With it switched in, you hardly notice hiss - the objectionable intruder inherent to tape recording. Unless effectively reduced, tape hiss is particularly more annoying during soft musical passages. And it's a problem no matter what type of tape you use. With the Dolby in the KD-21D, hiss noise is reduced by as much as 5 dB at 1 kHz and 10 dB above 5 kHz. Pulsive peaks are tamed to render high-frequency signals sound free from distortion and all forms of high-frequency noise.

JVC use the Dolby in a compact IC with components inside directly coupled. Its improved transient response means crisp reproduction, while dependability and stability are impeccable.

 

Considerations for Wider Dynamic Range

If a signal is clipped and distorted anywhere along the way from a deck's input to output, there's no way to restore it entirely to its original quality. Therefore, JVC have taken every consideration in the KD-21D to widen dynamic range and prevent distortion and clipping. There are, for example, a separate low-distortion amp for mics in an advanced 2-stage, direct-coupled NPN transistor ; a Mic/Line input selector that permits line inputs to go straight to the recording amp without adding distortion of its own; two 2-position Bias and Equalizer switches to make most of every tape on the market; and more.

 

Useful Recording Aids

These large VU meters enhance visibility to  help you make correct level adjustments. Together with the JVC's 5-LED Peak Indicator, they help you make clean tape recordings every time. As on the more expensive JVC models, our KD-21D is equipped with the Full Automatic Stop Mechanism to eliminate worry about stretched tapes or an overheated motor. A light in the tape well permits you to keep a close watch on the cassette at all times.

 

Specifications

Type:  stereo cassette deck

Track System:  4-track, 2-channel

Motors:  Electronic Governor DC motor

Tape Speed:  4,8 cm/sec

Fast Forward/Rewind Time:  100 sec with C-60 cassette

Heads: 

Recording/Playback :  Cronios head

Eraser: 2-gap , Ferrite head

Bias:  AC bias (95 kHz)

Erasure:  AC erasure (95 kHz)

Frequency Response: 

CrO₂ :  30 - 15,000 Hz (Typical)

Norm :  30 - 14,000 Hz (Typical)

Signal-to-Noise Ratio :  56 dB from peak level, weighted

The Signal-to-Noise Ratio is improved by 5 dB at 1 kHz and by 10 dB above 5 kHz with Dolby NR on.

Wow and Flutter:  0,10% (WRMS) 2,20 % (DIN 45 511)

Crosstalk:  65 dB at 1 kHz

Total Harmonic Distortion :  1,3% ( 1khz, 0 VU, Normal tape)

Input Sensitivity/Impedance:

MIC :  0,2 mV/600 Ω  - 10 k Ω

Line :  80 mV/100 k Ω

DIN :  0,07 mV/ k Ω 

Output Level/Impedance

Line :  420 mV/3,5 k Ω

DIN :  420 mV/3,5 k Ω 

Headphone :  0,3 mW/8  Ω  - 1 k Ω

Power Requirements: AC 120 V, 60 Hz (KD-10 C/J); AC 240/220/120 V 50/60 Hz (KD-10 A/B/E)

Power Consumption:  15 W

Dimensions (W x H x D):  390 x 157 x 259 mm (15-3/8" x 6-1/4" x 10-1/4")

Weight:  4,5 kg (9,9 lbs)