Search this site

Labels

4-channel ACCUPHASE ACOUSTIC ENERGY ADC ADCOM ADS ADVENT AIFAI AIWA AKAI AKG ALIANTE ALLISON ALTEC LANSING AMPEX AMPLIFON ANCIENT AUDIO AR ARCAM ARISTON ARMONIA AUDIA AUDIO ACADEMY AUDIO ANALOGUE AUDIO DYNAMICS AUDIO INNOVATIONS AUDIO NOTE AUDIO RESEARCH AUDIO-TECHNICA AUDIOLAB AUGUSTA AVALON AVID AXIOM Alchemist Audiostatic B-I-C BASF BASSOCONTINUO BEVERIDGE BEYER-DYNAMIC BOSE BOSTON BOWERS-WILKINS BOZAK BRAUN BRIONVEGA BSR Bang & Olufsen Bell Belt-Drive CAMBRIDGE CANTON CARVER CASTLE CD Player CD Transport CEC CELESTION CEMARK CERWIN-VEGA CHARIO CHARTWELL CIZEK CLARION CONRAD-JOHNSON COPLAND CORAL CORAL ELECTRONIC CREEK CROWN CYBERNET CYRUS California Audio Labs Centrex DAC DAHLQUIST DALI DAT DBX DECIBEL DENON DIAPASON DOKORDER DOMA DUAL DYNACO DYNAUDIO DYNAVECTOR Ditton EISA ELAC ELECTRO-VOICE EMPIRE EMT EPI EPICURE EPOS ES Series ESB ESOTERIC ESS EUMIG Esotec FAIRCHILD FOSTEX GALACTRON GALE GARRARD GENELEC GENESIS GIUSSANI RESEARCH GOLDENOTE GOODMANS GRAAF GRUNDIG H.H. SCOTT HAFLER HARBETH HARMAN/KARDON HEATHKIT HECO HIRTEL HITACHI HPM INDIANA LINE INFINITY JAMO JANSZEN JBL JEFF ROWLAND JENSEN JMLAB JVC KEF KENWOOD KLH KLIPSCH KOSS KRELL KYOCERA LAE LEAK LECTOR LENCO LESA LINN LOWTHER LUXMAN LYNGDORF Lafayette MAGNEPLANAR MARANTZ MARK LEVINSON MARTEL MARTINLOGAN MARUNI MASH MAXELL MBL MERIDIAN MERITON MICRO SEIKI MICRO-ACOUSTICS MIRAGE MISSION MITSUBISHI MONITOR AUDIO MONRIO MORDAUNT-SHORT MUSICAL FIDELITY MYRYAD McIntosh McLAREN NAD NAGRA NAKAMICHI NHT NIKKO NORESCO NOVA ONKYO OPERA OPTONICA ORTOFON PANASONIC PARADIGM PATHOS PEARL PHASE LINEAR PHILIPS PICKERING POLK AUDIO PSB Power-amplifier Pre-amplifier Pre-phono Pro-Ject QUAD RADFORD RCF REK-O-KUT REVOX ROGERS ROKSAN ROTEL ROYD RUARK Reel to Reel SACD SAE SANYO SENNHEISER SHARP SHERWOOD SHURE SIARE SIGNET SME SOMA SONAB SONUS FABER SONY SOTA SPECTRAL STANTON STAX STILE ITALIANO STRUSS SUGDEN SUPERSCOPE Soundcraftsmen Spica Stereo 8 Synthesis TAC TAD TAMON TANDBERG TANNOY TASCAM TDK TDL TEAC TECHNICS THE FISHER THIEL THORENS TOSHIBA TRANSCRIPTOR TRIO ULIX UNISON RESEARCH UREI UTAH Uni-Q VANDERSTEEN VOCE DIVINA VPI WADIA WHARFEDALE XAVIAN YAMAHA ZENITH ZINGALI amplifier cartridge direct-drive headphones idler italian lathe linear loudspeaker pioneer quadraphonic receiver sansui tangential tonearm tuner turntable unitra

What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Showing posts with label tape deck. Show all posts
Showing posts with label tape deck. Show all posts

Akai GX-280D-SS tape deck

4-Head 3-Motor Automatic Reverse Surround Stereo Tape Deck

Akai's GX Head 4-Channel Surround Stereo system eliminates the inability to pick up and reproduce true concert hall sound. Every pitch of sound and reverberation effect is reproduced with all of the exciting "sense of presence" experienced when attending a live concert. Akai's surround stereo supplements conventional stereo's two front speakers with two additional rear speakers to front the "2-2 system". The listener is surrounded by two sets of speakers (left & right front and left & right rear). This arrangement does not mean, however, that simply adding two speakers to a 2-channel stereo system is all that is necessary for 4-channel stereo playback. Four separate recordings are made using four individual channels (four tracks in one direction) of the magnetic recording tape. This 4-channel stereo tape feeds into four pre and main amplifiers to activate a 4-speaker system. Thus, at playback time, sounds from separate channels are emitted from each speaker providing the listener with a feeling that he is listening to concert hall sound from the best seat in the auditorium. Model GX-280D-SS is a compatible 4-channel/2-channel stereo model. For 2-channel stereo operation, only the front channels are utilized. For exciting 4-channel surround stereo, a 4-channel stereo external amplifier or two 2-channel stereo amplifiers can be used to activate a 4-speaker system.

 

GX (Glass & Crystal Ferrite) Head

Akai has equipped this model with its new and amazing Glass & Crystal Ferrite Recording and Playback heads to bring you unequalled open reel high fidelity sound. With the Glass & Crystal Ferrite head, superbly wider frequencies with clear highs can be recorded in all their true fidelity with low noise tape. In other words, with the GX head, a high dynamic range and excellent Signal-to-Noise Ratio are achieved. The secret of this quality head is made of single crystal ferrite and is mounted and set in glass. The superior high range characteristics are contributable to thw structure of the head gap which focused the magnetic field into a sharp oblong radius. This focused field recording system minimizes high frequency loss, eliminating undue equalization and achieving a wider dynamic range.

 


Specifications

Track System:  4-track, 4/2-channel stereo/monaural system

Reel Capacity:  up to 7" reel

Tape Speed:  7-1/2 and 3-3/4 ips (±0,5%)

Wow and Flutter:

At 7-1/2 ips :  less than 0,10% RMS

At 3-3/4 ips :  less than 0,15% RMS

Frequency Response (using Low Noise Tape)

At 7-1/2 ips :  20 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 20,000 Hz (±3 dB)

Frequency Response (using Regular Tape)

At 7-1/2 ips :  30 Hz to 23,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 19,000 Hz (±3 dB)

Distortion:  less than 0,8% (1,000 Hz, "0" VU)

Signal-to-Noise Ratio:  55 dB

Erase Ratio:  better than 70 dB

Bias Frequency:  110 kHz

Heads :  4 - GX recording and playback, full-track erase, 2-channel erase head

Motors:  3 - One Servo motor for direct capstan drive, two 6-pole outer-rotor motors for supply and take-up reel drive

Fast Forward and Rewind Time:  90 seconds using a 1200 ft tape at 60 Hz

Recording Capacity:

2-channel Stereo : 2 hrs (1,200 ft tape, 3-3/4 ips)

4-channel Stereo : 1 hr (1,200 ft tape, 3-3/4 ips)

Output Jacks

Line :  4x 1,23 V (0 VU)/10 k ; Required load impedance more than 25 k

Phone : 2x 40 mV/8

Input Jacks

Microphone :  4x 0,5 mV/10 k

Line :  4x 0,1 V/150 k

DIN Jack: 2x  0,4 V/60 mV (High) 10 mV (Low)

Semiconductors:  68 Silicon Transistors; 52 Diodes

Power Requirements:  100 V to 240 V 50/60 Hz

Power Consumption:  140 W

Dimensions (W x H x D):  435 x 505 x 250 mm (17,4" x 20,2" x 10")

Weight:  22,4 kg (49,5 lbs)


 

Akai GX-265D tape deck


Stereo Tape Deck

AC Servo Motor Direct Capstan Drive System

6 Head system Automatic and manual Reverse Recording and Playback

One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head make up the superior GX Head reverse recording and Playback system of this model. The quality and special process of the GX Head materials result in a wider dynamic range, better high frequency characteristics and tone quality and longer lasting performance. Manual Reverse Button and Automatic Sensing Tape Reverse completely eliminate the necessity of inverting reels by hand.

 

Symmetrical Head Block Layout for identical performance in both directions.

The arrangement of the head block is completely symmetrical in relation to the center capstan. The short and equi-distant tape path within the head block and between heads and reel tables on both sides assure identical performance in both directions. Tension Arms on both the take-up and supply reel sides provide perfect tape tension, also contributing to operating stability.

AC Servo Motor for capstan drive, Wow and Flutter reduced to 0,06.

The GX-265D employs a 3 motor drive system with a new AC Servo Motor for direct capstan drive, Rubber belts, flywheels, etc. are eliminated for reduced interference. This coupled with the center capstan system of this model reduces wow and flutter to an amazing 0,06%.

 

Microphone/Line Mixing

Individual Microphone and Line Input Level Controls and a built-in mic-line mixing circuit facilitate easy sound mixing from two separate sources.

Quick Pause Control

Depress the pause Switch to immediately suspend reel movement. When Pause mode is effected, the pinch wheel separates from the capstan by only 0,5 mm for a quick and smooth start when released. Especially convenient for editing tape.

Dual Monitoring

Tape/Source Monitor Switch enables comparison of source signals with just records signals for more professional recording results.

Automatic Stop

The Tension Arm/Stop lever drops at the end of the tape, activating an automatic stop mechanism which completely stops reel movement for operating safety.

Individual Track Selectors for Monaural or Stereo Preformance

Recording mode can be effected using individual left or right channel selectors or both channels simultaneously. A Recording indicator Lamp lights to confirm recording mode.

Output Level Control Enables Connection with any Amplifier

An Output Level Control facilitates adjustment of output level to correspond with your amplifier input.

Tape Selector Switch

A Tape Selector Switch facilitates the use of Low Noise or Wide Range tape. While high performance low noise tape is standard for this machine, the ability to use wide range tape further extends high range frequency response.

Feather Touch Controls for Smooth and Easy Mode Selection

VU Meter Scales Extended to +5 VU for Precise level Indication.

 


Specifications

Track System:  4-track, 2-channel stereo/monaural system

Reel Capacity:  up to 7" reel

Tape Speed:  7-1/2 and 3-3/4 ips (±0,7%)

Wow and Flutter:

At 7-1/2 ips :  less than 0,06% RMS

At 3-3/4 ips :  less than 0,09% RMS

Frequency Response (using Akai LN-150-7 Tape)

At 7-1/2 ips :  30 Hz to 25,000 Hz (±3 dB)

At 3-3/4 ips :  30 Hz to 19,000 Hz (±3 dB)

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

Signal-to-Noise Ratio better than56 dB (measured via tape with peak recording level of +6 VU)

Erase Ratio:  better than 70 dB

Bias Frequency:  100 kHz

Heads :  6 - One each GX forward recording, GX reverse recording, GX forward playback, GX reverse playback, forward erase, and reverse erase head

Motors:  3 - One AC Servo motor for capstan drive, two eddy current motors for reel drive

Fast Forward and Rewind Time:  90 seconds using a 1200 ft tape at 60 Hz

Output Jacks

Line :  2x 0,775 V (0 VU) Required load impedance more than 20 k

Phone : 1x 30 mV/8

Input Jacks

Microphone :  2x 0,25 mV/5 k

Line :  2x 70 mV/150 k

DIN Jack:  0,5 V/3 mV

Semiconductors:  38 Transistors; 26 Diodes

Power Requirements:  100 V to 240 V 50/60 Hz

Power Consumption:  80 W

Dimensions (W x H x D):  441 x 404 x 207 mm (7,4" x 15,9" x 8,2")

Weight:  16,6 kg (36,5 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

Line In  :  80 mV/470 k

DIN :  0,17 mV/k  

Output Level/Impedance

Line Out  :  0-500 mV/6.8 k

Headphone :  0-0,3 mW / 8 - 1 k

DIN :  0-500 mV/6.8 k

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

Line In  :  80 mV/470 k

DIN :  0,14 mV/k  

Output Level/Impedance

Line Out  :  390 mV/4 k

Headphone :  0,3 mW / 8 - 1 k

DIN :  390 mV/4 k

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

Line In (x2) :  80 mV/100 k

Output Level/Impedance

Line Out (x2) :  0 -500 mV/5 k

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

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  - 10 k

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

Output Terminals

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

Matching Load Impedance :  50 k  or more

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

DIN Socket

Min. Input Level :  0,1 mV /k

Input Impedance :  11 k

Output Level :  0 - 0,5 V

Output Impedance :  2 - 7 k

Matching Load Impedance :  50 k  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)


 

Nakamichi Dragon cassette deck

The ultimate innovation in cassette technology - precise, fully automatic playback head azimuth adjustment. Optimum reproduction quality in both forward and reverse playback modes.

In a slightly different genere than the luxurious 1000ZXL, the Dragon is undoubtedly the finest cassette deck available. It represents the culmination of Nakamichi's vast technical resources and experience, retaining the basic uncompromising Nakamichi standards of performance through use of such innovations as an Asymmetrical, Dual-Capstan Double-Direct-Drive Transport, a Discrete Three-Head configuration, very high quality record/playback amplifier circuitry and, of particular interest to perfectionists, our unique NAAC (Nakamichi Auto Azimuth Correction) for the ultimate in playback performance from both sides on any tape.

 


Proper azimuth alignment is one of the most important factors in achieving the best possible cassette reproduction quality. For this reason, several Nakamichi cassette decks offer either automatic or manual adjustment of record head azimuth. Ideally, however, playback head azimuth should be adjustable so that even tapes recorded on other decks will be reproduced with the recorded frequency response and sound quality fully intact. Commercially available music tape, tapes borrowed from a friend, tapes in which the shell has warped slightly (a common occurrence) - all actually require some degree of playback head azimuth alignment to provide the best possible reproduction quality. Further, inaccuracies in cassette shell symmetry result in completely different azimuth alignment requirements in forward and reverse on auto-revers decks, often causing a significant variation in sound quality. All these points and problems LED Nakamichi to the development of the world's first fully automatic playback head azimuth alignment system NAAC, and its incorporation into this fine deck.

The Dragon's unique double direct drive system employs two Nakamichi quartz PLL servo Super Linear Torque DD motors (one for each capstan) so that wow and flutter are essentially eliminated while maintaining perfect transport stability in both forward and reverse directions. Auto reverse operation has been made available only in the playback mode so that the superb performance of the Discrete Three-head System is not compromised. Of course, full provision is made for left and right channel bias and record/playback level adjustment. All the Dragon's performance features also mean that the built-in Dolby C-type noise reduction system operates under ideal conditions for the best performance. Likewise, heads, mechanism and amplifiers are all the best available, as are features such as the microcomputer-controlled, real-time mechanism control system proven in other Nakamichi decks. Convenience features include Auto Rec Pause, where the deck automatically enters the pause mode during recording if a blank interval of 30 seconds or longer is detected in the source, switchable MPX and subsonic filters, easy cueing, and a dual-speed auto fader function, for customized recording with professional fade-in/fade-out results.

 


Specifications

System Configuration:  4-track, 2-channel stereo

Heads:  3; erase head x 1; record head x 1; 4-track, 4-channel playback head x 1

Motors Transport :

 Two Quartz PLL DC brushless, slotless coreless Super Linear  Torque DD Motor for Capstan drive

 one DC Motor for reel drive

Auto Azimuth Correction :  DC Motor

Mechanism :  DC Motor

Tape Speed: 1-7/8 ips (4,8 cm/sec)

Wow and Flutter: less than 0,019% WTD RMS; less than ±0,04%  WTD Peak

Frequency Response:

20 Hz - 22,000 Hz ±3 dB (recording level -20 dB , ZX tape)

20 Hz - 21,000 Hz ±3 dB (recording level -20 dB , SX, EX II tape)

Signal-to-Noise Ratio:

Dolby C-Type NR On [70 µs, ZX tape] :  better than 72 dB (400 Hz, 3% T.H.D., IHF A-WTD RMS)

Dolby B-Type NR On [70 µs, ZX tape] :  better than 66 dB (400 Hz, 3% T.H.D., IHF A-WTD RMS)

Total Harmonic Distortion :  less than 0,8% (400 Hz , 0 dB, ZX tape)

Less than 1% (400 Hz, 0 dB, SX, EX II tape)

Erasure:  better than 60 dB (100 Hz, 0 dB)

Separation:  better than 37 dB (1 kHz, 0 dB)

Crosstalk:  better than 60 dB (1 kHz, 0 dB)

Bias Frequency:  105 kHz

Input Line Sensitivity/Impedance :  50 mV/50 k

Output Level/Impedance

Line  :  1 V (400 Hz, 0 dB, output level control at max.)/ 2,2 k

Headphone :  45 mW (400 Hz, 0 dB, output level control at max.)/ 8

Black Box Series DC Output:  ±10 V, 125 mA max.

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

Power Consumption:  45 W max.

Dimensions (W x H x D):  450 x 135 x 300 mm (17-3/4" x 5-5/16" x 11-13/16"

Weight:  9,5 kg (21 lbs)


 

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

Line In :  55 mV/50 k

Output Level/Impedance

Line Out :  0,4 mV/3 k

Headphone :  8  - 10 k

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

Mic :  0,3 mV/200  - 10 k

Output Level/Impedance

Line Out :  0,41 V/50 k

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

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

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

One DIN Connector (Rec/Play)

Input Sensitivity/Impedance :  12 mV/47 k

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

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)