Sanyo RD-4028UM cassette deck

Stereo cassette deck with Dolby Noise Reduction and CrO₂ /  FeCr / Normal Tape selector

Hiss-less audio reproduction with Dolby Noise Reduction

Separate equalizer and bias switches are provided for optimum use of any kind of tape

Wow and flutter is 0,12% WRMS, S/N ratio is 50 dB with the Dolby switch ON

Automatic shut-off in playback and record modes

Illuminated VU meters

Piano key tape function controls

Slide type recording level controls with level indexes

Jacks for microphones, headphone, line in, line out and DIN connectors

3-digit tape counter

 

Specifications

Recording System:  AC bias, 70 kHz

Erasing System:  AC erase, 70 kHz

Tape Speed:  1,7/8 ips (4,75 cm/sec)

Fast Forward and Rewind Time:  110 sec.

Wow and Flutter:  0,12% WRMS

Frequency Response:

Normal Tape :  30 - 13,000 Hz ±6 dB

CrO₂ Tape :  30 - 16,000 Hz ±6 dB

FeCr Tape :  30 - 15,000 Hz ±6 dB

Signal-to-Noise Ratio

Dolby ON :  50 dB

Dolby OFF :  58 dB

Inputs Sensitivity/Impedance

Mic :  0,3 mV/10 k Ω

Line In :  55 mV/50 k Ω

Output Level/Impedance

Line Out :  0,4 mV/3 k Ω

Headphone :  8 Ω  - 10 k Ω

Semiconductors:  3 ICs; 8 Transistors; 10 Diodes

Power Requirements:  AC 110/125/220 V 50/60 Hz

Power Consumption:  7 W

Dimensions (W x H x D):  385 x 130 x 260 mm

Weight:  3 kg (6 lbs 10 oz)

 

Aiwa SD-L30 cassette deck

Stereo Cassette Deck

High performance recording and playback in a tape deck less than 7,2 cm high

A full-fledged, full-performance stereo unit with every essential feature you'd expect to find in larger systems, the SD-L30 combines modern styling with an incredibly precise slot-in loading mechanism and reliable DC servo motor that makes you wonder why decks got so big and complicated in the first place.

Metal Compatibility

The ability to make recordings on high performance metal cassettes is no longer a luxury confined to high priced avantgarde models; Aiwa has modified the SD-L30's circuitry and boosted erasure power to ensure full compatibility with metal. Along with extended frequency response metal tapes will give such dynamic sound you'll want to use them for all your serious recording work. A tough long-wearing hard Permalloy record/playback head and dounble-gap ferrite erase head ensure trouble free performance from all tape formulations.

Optical Peak Display

Besides conserving space, responsive peak LEDs provide an additional measure of accuracy to take the guesswork out of record level adjustment. Signals are indicated separately for left and right channels in an easy-to-read 3-color sequence from -10 dB to +6 dB

Amazingly, the SD-L30 even has rear panel jacks to accommodate a pair of microphones for live stereo recordings

Plus features:

Dolby NR system

Full auto stop

Separate L/R record volume controls

Line/mic input selector

Digital tape counter

Head cleaning access window

 

Specifications

Wow and Flutter:  0,09% WRMS

Signal-to-Noise Ratio:  60 dB (Dolby On)

Frequency Response

LH Tape :  25 -14,000 Hz

CrO₂ Tape :  25 - 16,000 Hz

Metal Tape :  25 - 16,000 Hz

Input Sensitivity/Impedance

Line In :  50 mV/50 k Ω

Mic :  0,3 mV/200 Ω  - 10 k Ω

Output Level/Impedance

Line Out :  0,41 V/50 k Ω

Head

Rec/Playback :  Hard Permalloy head

Erase :  Hi-Bs double gap ferrite head

Motor:  DC servo motor

Power Requirements:  240 V 50/60 Hz

Dimensions (W x H x D):  210 x 72 x 229 mm

(8-5/16" x 2-7/8" x 9-1/16")

Weight:2,8 kg (6,2 lbs)

 

Superscope CD-302A cassette deck

Stereo cassette tape deck, features:

Built-in Dolby Noise Reduction System - with internal/external switching that enables it to operate as an independent out board playback Dolby system. Unlike most other Dolbyized units, the CD-302A Deck can also deprocess Dolbyized material from FM broadcasts and other tape recorders.

Automatic Shut-Off - that disengages the cassette drive mechanism at end-of-tape in record and play modes.

 

 

Recording Peak Limiter - that monitors and holds the recording level below saturation to prevent distortion while maintaining a full dynamic range.

Tape Select Switch - for proper bias and equalization when using either standard or chromium dioxide tape.

Mechanical Locking Pause Control - that enables you to pause during playback or recording without disengaging controls

VU Meters, Function Indicators and Cassette Compartment - that are illuminated for easy viewing

3-Digit tape Counter - with a reset button.

Walnut-Grained cabinetry - and the professional styling you'd expect to find only in more expensive units.

 

Specifications

Tape Speed:  4,8 cm/sec. (1-7/8 ips)

Reel Size:  compact cassette

Recording System:  Quarter-Track Stereo

Rewind and Fast Forward Time:  85 sec. C-60 cassette

Frequency Response

Standard Tape :  40 - 10,000 Hz

Chromium Dioxide Tape :  40 - 14,000 Hz

Signal-to-Noise Ratio

Standard Tape :  48 dB

Chromium Dioxide Tape :  51 dB

Bias Frequency:  85 kHz

Type of Level Indication:  Two VU Meters

Head Configuration

1 half-Track Erase

1 Quarter-Track Record/Playback

Wow and Flutter:  0,2% at 4,8 cm/sec. (1-7/8 ips)

Type of Motor:  One DC Electrical Governor Controlled

Semiconductors:  30 Transistors; 21 Diodes; 2 FET's

Inputs Sensitivity/Impedance:

Two Auxiliary (one for each channel Plug type Phono):  60 mV/180 k Ω

Two Microphone (one for each channel, Plug type Mini):  -72db/ low impedance

Outputs Level/Impedance:

Two Line (one for each channel, Plug type Phono):  0,775 V (at 0 VU) / 6 k Ω

One Stereo Headphone (Plug type Phono):  44 mV/8 Ω

One DIN Connector (Rec/Play)

Input Sensitivity/Impedance :  12 mV/47 k Ω

Output Level/Impedance :  0,775 V (at 0 VU) / 6 k Ω

Power Requirements:  110/220/240 Volts AC 50/60 Hz

Power Consumption:  11 Watts

Dimensions (W x H x D):  318 x 83 x 225 mm (12-1/2" x 3-1/4" x 8-7/8")

Weight:  2,7 kg (6 lbs)

 

Sanyo RD-4300 cassette deck

Stereo Cassette Tape Deck

The perfect stereo cassette tape deck for audio perfectionists. This brand new Sanyo model contains Dolby Noise (Reduction) which almost completely eliminates annoying huma and hissing sounds that heretofore have been an unavoidable part of stereo cassette recording and playback. This advanced unit also has a tape select switch for nominal or high quality chrome tapes. Monitoring while recording is also possible and a cue control and full automatic shut off are built in. At the end of a recording a special memory counter returns the tape to the exact beginning of the freshy recorded material.

Other outstanding features include a pause button, output level control for lineout level, DIN connector and two large VU meters a panel that automatically rises up from the unit at the touch of a button. The Signal-to-Noise Ratio of model RD4300 with the Dolby switch on is 58 dB and the amazingly flat frequency response when a chrome tape is used is 20 to 18,000 Hz. An outstanding stereo tape deck for audio enthusiasts who refuse to settle for less than the best.

 

Features

Dolby noise Reduction

A simple comparison of sounds with the Dolby function switch on and then off clearly shows the value of this noise reduction circuit. Tape hissing and other irritating sounds and humming are almost totally suppressed.

Convenient cueing control, Auto Stop

Finding recorded sections of the tape during fast forward and rewind has been greatly facilitated with a built-in cueing device. There is also a full automatic shut off system that turns off the mechanism at the end of the tape during playback, recording, rewind or fast forward.

Tape select switch for ordinary and chrome tapes

This unit takes both chromium dioxide and ordinary cassette tapes. The wider frequency response of chrome tapes is rated at 20 to 18,000 Hz. A tape select switch is provided for differentiating between the two types.

Excellent sound characteristics

Wow and flutter of this model is 0,1% RMS, and the Signal-to-Noise Ratio when the Dolby switch is on is rated at 58 dB

Two large VU meters

For precision recording and playback two large VU meters are supplied. These meters are built into a special panel that tilts up automatically from the unit at the touch of a button.

Other

Other features include a pause button, separate record/play controls, two microphone inputs, a double eject system that allows you to check the amount of tape left without disturbing the playback or recording and a detachable plate for easy head-cleaning.

 

Specifications

Recording System:  AC bias, 1/4 track stereo

Erasing System:  AC erase

Tape:  Chromium dioxide tape or ordinary cassette tape

Tape Speed:  1-7/8 ips (4,75 cm/sec.)

Recording Time:  60 min. (double-track C-60 tape)

Fast Forward and Rewind Time:  70 sec.

Wow and Flutter:  0,1% RMS

Frequency Response:

Chrome Tape :  20 - 18,000 Hz

Ordinary Tape :  20 - 16,000 Hz

Signal-to-Noise Ratio

Dolby ON :  58 dB

Dolby OFF :  50 dB

Inputs Impedance

MIC :  20 k Ω

AUX :  500 k Ω

DIN :  10 k Ω

Output Impedance

Headphone :  10 k Ω

Line Out :  2 k Ω

DIN :  2 k Ω

Semiconductors:  30 Transistors (includes 2 x FET), 21 Diodes

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

Dimensions (W x H x D):  440 x 120 x 242 mm (17-1/2" x 4-3/4" x 9-1/2")

Weight:  5,7 kg (12,6 lbs)

 

Sharp RT-2266 cassette deck

Solenoid touch. APLD search. Metal tape compatible, soft, easy and dynamic.

Front-loading stereo cassette deck with Dolby Noise Reduction and featuring the Auto Program Locate Device (APLD), soft-touch solenoid transport and metal tape capability.

 

Exclusive Auto Program Locate Device (APLD) for pushbutton location of any selections forward or backward.

Two-motor drive system reduces Wow and Flutter and assures outstanding speed stability.

Microprocessor solenoid cassette controls for selection of tape transport mode, recording and auto spacing functions.

Metal tape selector switch for optimum performance from metal tapes,

Individual bias and equalization switches assure optimum response from CrO₂/Fe-Cr/Normal tapes

Easy-to-read Sharpscan peak level display with peak hold function for more accurate and reliable recording level adjustments.

Output level control to match the signal from cassettes to other sound sources in your stereo system

PP (Permalloy Plus) record/playback head developed to ensure greater wear resistance and optimum audio performance with metal as well as other tapes

Double-gap ferrite erase head creates a stronger magnetic field for more thorough erasing

Automatic end-of-tape shut-off in any mode to protect tapes

Illuminated indicators show operating mode at a glance

Electronically-controlled DC capstan motor for absolute speed stability and low Wow and Flutter

Auto spacing mechanism for creating non-signal segments between musical selections.

Pause control for instant, non-blurring tape start-up after editing.

Front-panel inputs for stereo headphones and microphones

Individual level controls for Line and Mic mixing.

Digital tape counter for instant tape location reference

Illuminated tape compartment for visual tape checking.

 

Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,045% WRMS

Frequency Response:

Normal Tape :  25 - 15,000 Hz (30 - 14,000 Hz ±3 dB)

CrO₂ Tape : 25 - 17,000 Hz (30 - 16,000 Hz ±3 dB)

Fe-CR Tape : 25 - 18,000 Hz (30 - 17,000 Hz ±3 dB)

Metal Tape :  25 - 19,000 Hz (30 - 18,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  57 dB

Dolby NR On :  67 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  Permalloy Plus

Erase :  Double Gap Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  50 mV (-26 dB) / 70 k Ω

Output Level/Impedance

Line -Out :  500 mV/47 k Ω  (at 0 dB)

Headphone :  63 mV/8 Ω  (at 0 dB)

Power Requirements:  AC 120 V 60 Hz

Power Consumption:  40 W

Dimensions (W x H x D):  430 x 144 x 260 mm (16-15/16" x 5-11/16" x 10-1/4")

Weight:  7,3 kg (16,1 lbs)

 

Sharp RT-1199 cassette deck

Front-loading stereo cassette deck.

The convenience of APLD. The quiet of Dolby NR. The range of metal tape.

Features:

Exclusive Auto Program Locate Device (APLD) with illuminated indicator

Easy-to read Sharpscan peak level display that promises greater accuracy and reliability for more confident recording level adjustments

Metal tape selector switch for optimum performance from metal tapes

Individual bias and equalization switches to optimize performance with CrO₂/Fe-Cr/Normal tapes

PP (Permalloy Plus) record/playback head developed to ensure greater wear resistance and optimum audio performance with metal as well as other tapes

Double-gap ferrite erase head creates a stronger magnetic field for more thorough erasing

Automatic end-of-tape shut-off in any mode to protect tapes

Improved electronically controlled DC motor for absolute speed stability and low Wow and Flutter

Mechanical pause control for instant, non-blurring tape start-up after editing

Individual level controls for Line and Mic mixing

Outputs level control to match the signal from cassettes to other sound sources in your stereo system

Front-panel jacks for stereo headphones and microphones

Illuminated tape compartment for visual tape checking

LED recording and Dolby NR indicators

Digital tape counter for instant tape location reference

 

Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,058% WRMS

Frequency Response:

Normal Tape :  30 - 15,000 Hz (40 - 12,500 Hz ±3 dB)

CrO₂ Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Fe-CR Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Metal Tape :  30 - 18,000 Hz (40 - 16,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  57 dB

Dolby NR On :  67 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  Permalloy Plus

Erase :  Double Gap Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  63 mV (-24 dB) / 50 k Ω

Output Level/Impedance

Line -Out :  710 mV/50 k Ω  (at 0 dB)

Headphone :  89 mV/8 Ω  (at 0 dB)

Power Requirements:  Ac 120 V 60 Hz

Power Consumption:  18 W

Dimensions (W x H x D):  430 x 144 x 245 mm (16-15/16" x 5-11/16" x 10-3/8")

Weight:  6 kg (13,2 lbs)

 

Sharp RT-10 cassette deck

Front-loading stereo cassette deck

Metal tape dynamism plus LED peak level display precision

Outstanding features:

Metal tape selector switch for optimum performance from metal tapes

Easy-to-read 10-LED peak level display that assures more accurate and reliable recording level adjustments

Bias and equalization switch to optimize performance with CrO₂/Normal tapes

New hard permalloy head for extended high frequency response

Dolby Noise Reduction cuts tape hiss and improves Signal-to-Noise Ratio by up to 10 dB at over 5 kHz

Automatic end-of-tape shut-off in any mode to protect tapes

Electronically-controlled DC motor for absolute speed stability and low wow and flutter

Line/Mic input selector switch in rear for live recordings or dubbing from records or radio

Mechanical pause control for instant, non-blurring tape star-up after editing

Digital tape counter for instant tape reference

Dolby is a trademark of Dolby Laboratories

 

Specifications

Number of Tracks: 4-track 2-channell stereo

Recording System:  AC bias (105 kHz)

Erase System:  AC erase (105 kHz)

Tape Speed:  1-7/8 ips (4,8 cm/s)

Wow and Flutter:  0,09% WRMS

Frequency Response:

Normal Tape :  30 - 14,000 Hz (40 - 12,000 Hz ±3 dB)

CrO₂ Tape : 30 - 16,000 Hz (40 - 13,000 Hz ±3 dB)

Metal Tape :  30 - 16,000 Hz (40 - 14,000 Hz ±3 dB)

Signal-to-Noise Ratio (CrO₂ Tape )

Dolby NR Off :  52 dB

Dolby NR On :  62 dB (at over 5 kHz)

Tape: Standard cassette tape

Motor:  Electronically-controlled DC Motor

Heads: 

Record/Playback :  New hard permalloy

Erase :  Ferrite

Input Sensitivity

Microphone :  0,2 mV (-74 dB) / 6,8 k Ω

Line-In :  50 mV (-26 dB) / 50 k Ω

Output Level/Impedance

Line -Out :  580 mV/50 k Ω  (at 0 dB)

Headphone :  40 mV/8 Ω  (at 0 dB)

Power Requirements:  Ac 120 V 60 Hz

Power Consumption:  7 W

Dimensions (W x H x D):  390 x 125 x 226 mm (15-3/8" x 5" x 8-7/8")

Weight:  3,2 kg (7 lbs)

Meriton HD-540 cassette deck

The HD-540 features the Dolby System, designed to minimize annoying noise and tape hiss present in all tape recordings. A system so effective, it improves Signal-to-Noise Ratio 8 dB (from 50 dB to 58 dB with Dolby operating). The HD-540 with Dolby also reduces tape hiss level without effecting frequency response or adding distortion. The result : noise -free music. A rewarding experience.

Whatever the personal tape preference, the HD-540 is equipped for exceptional results with a tape bias and equalization control. This switch operates to change over the recording bias current, equalizer characteristic and recording level of the cassette deck depending on which type of tape is used; chromium dioxide, ferri-chrome or low/noise and high output or regular type cassettes. New ferri-chrome tape gives a wider dynamic range and less distortion producing a superior bass and middle frequency response.

 for greater frequency response, durability and matchless recording results, this is the finest tape head made. A single-piece-core construction tape head manufactured under exacting conditions. Especially critical today due to the wide use of high-density chrome dioxide tapes. The advantages of this ferrite head are wide dynamic range , low distortion, and a high Signal-to-Noise Ratio. It is also built for long wear.

Servo Motor

A solid state synchronous DC servo-motor with servo circuit is used in the HD-540 to ensure constant speed revolutions, long-life and reduce noise. Other benefits of this precision-engineered motor are minimal wow and flutter figure of 0,11%

Employed in the HD-540 is an electronic sensor mechanism that automatically stops the motor and releases which ever function control is engaged. This feature saves consider able wear on the tape head, while it helps to prevent undesirable sound effects such as wow.

A convenient device for either recording or playback, the pause switch instantly and temporarily stops the tape. Commercials from a station you are recording can be eliminated.

VU Meters

To increase the accuracy of tapes recorded on the HD-540, Meriton has designed highly efficient VU meters for each channel. Designed with scales marked to permit visual confirmation of louder signals made necessary by the wider dynamic range of the new types of tape.

Quick review and cue buttons, to a fast way to locate a particular section of the tape. Press the desired button and tape will move forward or reverse while still in play position

 

Specifications

Type:  4-track, 2-channel stereo

Tape Speed:  1-7/8 ips

Motor:  DC Servo-motor

Head

1 x Rec/Playback Ferrite head

1 x Erase Ferrite head

Bias Frequency:  85 kHz

Wow and Flutter: 

Playback :  0,11% WRMS

Rec/Playback :  0,13% WRMS

Frequency Response

LH tape :  30 Hz - 13,000 Hz

CrO₂ Tape :  30 Hz - 16,000 Hz

FeCr Tape :  30 Hz - 16,000 Hz

Signal-to-Noise Ratio:  50 dB (58 dB with Dolby)

Distortion: less than 2,0%

Input Sensitivity/Impedance

Line Input :  50 mV/10 k Ω

Mic Input :  0,3 mV/600 Ω  - 10 k Ω

Output Level/Impedance

Line :  775 mV/10 k Ω

Headphone :  0,7 mV/8 Ω

Semiconductors:  31 Transistors; 26 Diodes; 2 FET

Power Requirements: AC 120 V, 60 Hz

Power Consumption:  10 Watts

Dimensions (W x H x D):  15-15/15 x 4-1/8 x 10-1/4 inch

Weight:  11 lbs 4 oz

 

Akai GXC-710D cassette deck

The GXC 710D is another front-load model , and very sophisticated it is, too.

The Double Action" eject and tape loading safety feature is completely foolproof. When you press the Eject button, the cassette envelope moves out from the front panel just like a drawer. The upper part is carefully positioned for easy tape loading and levers at either side of the cassette holder make sure the cassette can't be inserted upside down. It's easy it's simple. And it's safe.

The combination once again of Akai's GX head plus Dolby Noise reduction plus Akai's ADR system plus a new drive system gives the highest of hi-fi performance. Tape speed is perfectly stabilised. Wow/flutter is as low as 0,08% rms. What's more, with the switchable Multiplex Filter circuit to cut out the 19 kHz pilot signal during stereo broadcast recording through an FM receiver, you get a clear and undistorted frequency response range to 17,000 Hz.

The rest of the features you can almost tale for granted. But let's just remind you of them to make sure you know exactly how much the GXC 710D has to offer you.. Memory Rewind Peak Level Indicator. Tape Selector Switches (low noise, CrO₂, ferrichrome) Direct Function Change Controls . Mic/Line Input Selector for improved Signal-to-Noise Ratio . Automatic Stop with tape release. Pause Control Line Output Level Control.

The GXC 710D is, as we said a very sophisticated machine- in its styling , in its features and in its outstanding performance.

 

Specifications

Track System:  4-trak, 2-channel stereo

Tape Speed:  4,8 cm/s (1-7/8 ips

Wow and Flutter:  less than 0,08% WRMS

Frequency Response: 

Low Noise Tape :  30 to 14,000 Hz (±3 dB)

CrO₂ Tape :  30 to 16,000 Hz (±3 dB)

Fe-Cr  Tape :  30 - 17,000 Hz (±3 dB)

Distortion:  less than 1,5 % (1,000 Hz 0 VU)

Signal-to-Noise Ratio:  better than 50 dB (with Dolby; up to 60 dB , above 5 kHz)

Bias Frequency:  100 kHz

Erase Ratio:  better than 70 dB

Heads:  GX recording/playback head and erase head

Motor:  4-pole hysteresis synchronous outer-rotor motor

Fast Forward and Rewind Time:  80 sec C-60 cassette tape

Output Jack: 

Line :  0,775 V (0 VU) required load impedance; more than 10 k Ω

Phone :  30 mV/8 Ω

Input Jack:

Microphone :  0,3 mV/5 k Ω

Line :  70 mV/100 k Ω

DIN Jack : 

Output :  0,55 V

Input :  3 mV

Dimensions (W x H x D):  440 x 142 x 304 mm (17,3" x 5,6" x 12")

Weight:  8,8 kg (19,4 lbs)

 

Akai GXC-310D cassette deck

The GXC-310D takes great pride in its performance. For example, it has a closed loop double capstan drive system - a feature usually found only in very expensive cassette models. With this system, the recording/playback heads is positioned in the centre between two capstans and pinch rollers. This not only gives better head-to-tape contact but also maintains constant tape tension.

An integral part of this system is an anti-vibration hysteresis synchronous motor. The net result of this combination is outstanding tape travel stability, constant tape tension and speed, and an excellent wow/flutter specification of 0,07% RMS.

Like all Akai cassette machines, the GXC-310D features the Dolby NR system to reduce tape hiss to a virtually inaudible level, give a bigger frequency response and a better Signal-to-Noise Ratio. But it also features Akai's ADR (Automatic Distortion Reduction) system which varies the equalisation at high input levels to cut distortion and extend the dynamic range at high frequencies.

Its amny other features include a Peak Level indicator, Automatic Stop, Limiter switch, Mic/Line Input Selector for a wider dynamic margin and less noise, Pause Control, Output Level Control for perfect matching with any amplifier input, Tape Run indicator, Memory Rewind and Index Counter, direct function change controls and a bias and equalisation switch for low noise, CrO₂ or ferrichrome tape. Again, there's a specially designed perspex dust cover as an optional extra.

 

Specifications

Track System:  4-trak, 2-channel stereo

Tape Speed:  4,8 cm/s (1-7/8 ips

Wow and Flutter:  less than 0,07% WRMS

Frequency Response: 

Low Noise Tape :  30 to 14,000 Hz (±3 dB)

CrO₂ Tape :  30 to 16,000 Hz (±3 dB)

Fe-Cr Tape :  30 - 17,000 Hz (±3 dB)

Distortion:  less than 1,5 % (1,000 Hz 0 VU)

Signal-to-Noise Ratio:  better than 50 dB (with Dolby; up to 60 dB , above 5 kHz)

Bias Frequency:  100 kHz

Erase Ratio:  better than 70 dB

Heads:  GX recording/playback head and erase head

Motor:  4-pole hysteresis synchronous outer-rotor motor

Fast Forward and Rewind Time:  75 sec C-60 cassette tape

Output Jack: 

Line :  0,775 V (0 VU) required load impedance; more than 10 k Ω

Phone :  30 mV/8 Ω

Input Jack:

Microphone :  0,3 mV/5 k Ω

Line :  60 mV/100 k Ω

DIN Jack : 

Output :  0,4 V

Input :  2 mV

Dimensions (W x H x D):  440 x 142 x 300 mm (17,3" x 5,6" x 11,8")

Weight:  8,6 kg (18,9 lbs)

 

Nakamichi 580 cassette tape deck

The Crystalloy SuperHead

The 580 uses the record/play SuperHead, originally introduced on the 600 II Cassette Console. The latest version of this head boasts an incredibly narrow 0,9 micron gap. This is narrower than most playback-only heads in three-head designs, and it assures distortion-free playback of the highest frequencies. Yet, during record, the amazing SuperHead magnetizes the tape as if it has a much wider gap, thanks to proprietary manufacturing techniques that virtually eliminate head core saturation. The prof. Is in the 580's remarkable frequency response, there are many three-head cassette decks on the market that cannot come close to matching this performance. The magnetic properties of Crystalloy, furthermore, are far closer to ideal than anything else currently available, including sendust to none, which means distortion is very low. And thanks to special surface "cutouts", the SuperHead lasts a long time. 

 

 

The Direct Flux Erase Head

Mast manufacturers would be very satisfied indeed with a unique device lke the record/play SuperHead. But Nakamichi's in-depth research has shown that even the best of record/play heads can be further improved by providing more complete erasure than normally available. Any noise left on the tape before it reaches the record head can be detrimental to sound quality. The noise is "modulated" by the record head signal, and the recording is thus robbed of clarity. This has been a much neglected area because most designers assume that all an erase head needs do is bring the previously recorded signal down to the level of tape hiss. But in our tests, we found that recordings made on "virgin" or bulk-erased tape sounded better and had less modulation noise than a recording made on normally erased tape. The implication was clear; an erase head should ideally do the same thing as a powerful bulk-eraser.

 

Specifications

Tape Speed:  4,8 cm/s (1-7/8 ips) ±1%

Wow and Flutter:  less than 0,1% WTD Peak 0,05% WTD rms

Frequency Response:  20 - 20,000 Hz ±3 dB (SX, EXII Tapes, -20 dB Rec. Level)

Signal-to-Noise Ratio:  better than 60 dB at 400 Hz, 0 dB, IHF-A WTD rms (Dolby  NR In. SX Tape) better than 63 dB at 400 Hz, 0 dB (SX, EXII Tapes

Total Harmonic Distortion :  less than 1,5% at 400 Hz, 0 dB (SX, EXII Tapes)

Erasure:  better than 60 dB below saturation level at 1 kHz

Separation:  better than 37 dB at 1 kHz, 0 dB

Crosstalk:  better than 60 dB at 1 kHz, 0 dB

Bias Frequency:  105 kHz

Input Sensitivity/Impedance:  50 mV/50 k Ω

Output Level/Impedance:  1 V (400 Hz, 0 dB, (at Max.)/3,3 k Ω

Headphone:  45 mW

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

Power Consumption:  20 W max.

Dimensions (W x H x D):  500 x 130 x 350 mm (19-11/16" x 5-1/8" x 13-25/32")

Weight:  8,3 kg (18 lb 5 oz)

 

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)