Denon DRA-600 receiver

Class-A Amplification and Synthesized Tuning AM/FM Stereo Receiver

The first receiver from a true Audiophile Company, Denon DRA-600

The Denon DRA-600, a synthesis of Denon's greatest technological strengths. From our many years of experience with moving-coil cartridges we gave it a moving-coil preamplifier stage sonically as transparent as our renowned separate head-amps.

From our fifty-plus years (1981) of electronics design experience, we powered the DRA-600 with a proprietary Denon Class-A power amp, a design that delivers unparalleled definition and openness, yet avoids the excessive heat, size and cost of traditional Class-A amplifiers

And, from our decade of experience since our invention of commercial digital recording (PCM), we equipped the DRA-600 with a digitally synthesized tuner stage for the most precise station tuning with the lowest distortion. Plus we added the convenience of eight AM and Eight FM presets with automatic station scanning. The DRA-600 from Denon, where innovation is a tradition.

 

Features

Non-switching class-A amplifier with large output power

Quartz-PLL frequency synthesizer for accurate tuning

Built-in head amplifier for MC type cartridge

Elegant , clean design with optional wooden cabinet

 

Specifications

Power Amplifier Section

Type:  Non-switching Class-A amplifier

Music Power:  120 W + 120 W at 4 Ω

Output Power:  60 W per channel, min. RMS , both channel driven, at 8  hm from 20 Hz to 20 kHz, no more than 0,08% Total Harmonic Distortion;

Intermodulation Distortion:  0,03%

Signal-to-Noise Ratio:  82 dB

Power Bandwidth:  5 Hz - 100 kHz (T.H.D. 0,5%)

Frequency Response:  20 Hz - 20,000 Hz ±0,5 dB

Input Sensitivity/Impedance:  2,5 mV/47 k Ω

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble :  ±10 dB at 10 kHz

Loudness Control:  Low (+8 dB at 100 Hz); High (+4 dB at 10 kHz)

Crosstalk:  70 dB

FM Tuner Section

Tuning Frequency:  88 - 108 MHz

Usable Sensitivity:  1,7 µV (9,8 dBf)

Effective Selectivity:  60 dB

Signal-to-Noise Ratio

Stereo :  70 dB

Mono :  75 dB

Total Harmonic Distortion

Stereo :  0,30%

Mono :  0,15%

Frequency Response:  20 - 15,000 Hz +0,2 dB -1,5 dB

AM Tuner Section

Tuning Frequency:  525 - 1605 kHz

Usable Sensitivity:  53 dB

Effective Selectivity:  30 dB

Signal-to-Noise Ratio:  55 dB

Power Supply:  AC 120 V 60 Hz or AC 220/240 V 50/60 Hz

Power Consumption:  130 W

Dimensions (W x H x D):  434 x 112 x 390 mm

Weight:  10 kg

 

JVC KD-A33 cassette tape deck

Metal-compatible cassette deck

If you've found that an affordable price usually means a sacrifice of performance, take heart. The JVC KD-A33 metal compatible cassette deck includes much of the technology found in our most expensive decks. Yet it happens to be one of our least expensive decks.

For example, it uses Sen-Alloy heads. These JVC-developed heads handle tremendously high currents with ease, so they're especially well  suited for recording and erasing metal tape. And SA's superb electromagnetic and physical properties give you accurate frequency balance, superb extension and low distortion through years of use.

When you use metal tape with the KD-A33, you'll get all the performance you expect from metal . But when your budget  dictates using a less expensive ferric-oxide tape, you can still get metal-like sound thanks to another JVC development - Super ANRS.

In recording, Super ANRE reduces the level of high-frequency signals so the tape can handle them without, saturating, in playback, it boosts them back to their original level. As a result, sounds like cymbal crashes, trumpet blast, and spoken sibilants (normally the downfall of cassette recording) are reproduced with astonishing clarity and fidelity to the original

 

 

 

And like our most expensive decks, the KD-A33 has logic-governed solenoid transport controls. You can switch directly between modes, even from "rewind" to "fast forward" with just a light touch of a switch. The KD-A33 also has provisions for adding a timer device and optional remote control.

Specifications

Type:  Stereo cassette deck

Track System:  4-track, 2-channel

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

Frequency Response (0 VU Recording)

Metal Tape :  30 - 12,500 Hz (±3 dB)

SA/CrO₂ Tape :  30 - 8,000 Hz (±3 dB)

SF/Normal Tape :  30 - 8,000 Hz (±3 dB)

Frequency Response (-20 VU Recording)

Metal Tape :  20 - 18,000 Hz [30-16,000 Hz ±3 dB]

SA/CrO₂ Tape :  20 - 18,000 Hz  [30-16,000 Hz ±3 dB]

SF/Normal Tape :  20 - 17,000 Hz  [30-16,000 Hz ±3 dB]

Signal-to-Noise Ratio (from peak level, weighted, Metal Tape) :  60 dB

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

(DIN  45 500 weighted)

Effect of Super ANRS (Normal Tape)

Improvement of S/N :  the same as with ANRS

Improvement of Frequency Response :

0 VU Recording :  6 dB at 10 kHz

+5 VU Recording :  12 dB at 10 kHz

Improvement of Distortion :

0 VU Recording :  3% or less at 10 kHz

+5 VU Recording :  2% or less at 10 kHz

Wow and Flutter:0,04% (WRMS); 0,14% (DIN  45 500)

Crosstalk:  65 dB (1 kHz)

Harmonic Distortion :  K3; 0,4$ T.H.D.; 1,0% (metal Tape , 1 kHz 0 VU)

Bias :  AC Bias

Erasure :  AC erasure (85 kHz)

Heads:  2 heads; Sen Alloy head for recording/playback and 2-gap Sen Alloy head for erasure

Motors : 

Capstan :  Electronic Gaverned DC motor

Reel :  DC motor

Fast Forward Time :  85 sec. With C-60 cassette

Rewind Time :  85 sec. With C-60 cassette

Semiconductors:  7 ICs; 57 Transistors; 31 Diodes

Input Sensitivity/Impedance

Mic Jack x 2 :  0,2 mV (max.)-72 dBs/ 600 Ω  - 10 K Ω  (matching impedance

Line Input x 2 :  80 mV (-20 dBs)/100 K Ω

Output Level/Impedance

Line x 2 :  300 mV/5 ko hm

Phones x 1 :  0,3 mW/ 8 Ω  - 1 k Ω

DIN Socket: 

Input Level :  0,1 mV/k Ω

Input Impedance :  10 K Ω

Output Level :  300 mV (8 Ω )

Output Impedance :  5,5 k Ω

Matching Impedance :  50 K Ω  or more

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

Power Consumption:  21 W

Dimensions (W x H x D):420 x 120 x 300 mm (16-1/2: x 4-3/4" x 11-7/8")

Weight:  6,7 kg (14,7 lbs)

 

Sansui SP-3500 speakers

4-Way 6-Speaker Multi-Direction Speaker System

Perhaps the most timely speaker system ever introduced, this new 100 watt Multi-Direction (MD) system takes you beyond the reproduction of sound source points to an incredibly lifelike method of reproduction approximating that of an original sound field. This makes the SP-3500 the foremost system available today for the new age of 4-channel stereo. The secret to the SP-3500's living sound lies in its MD System, a new way of angle-mounting speakers within the enclosure to re-create within the listening room the complex interference of sound waves present in the original sound field. All six of the SP-3500's speakers, including a newly developed 14-inch woofer, were specifically selected to achieve this effect. Even Sansui's famed Kumiko fretwork grille has been redesigned in the SP-3500.. It now is gracefully curved to add to the over all elegance of this new system.

 

4-Way, 6-Speaker, 100 Watts

The SP-3500 is of a 4-way 6-speaker design, consisting of a large 14-inch high-cut type, high-compliance woofer, a 4-1//2- by 2-inch horn midrange with a sound diffuser and pair of "multi-directional" 4 -inch cone midranges with aluminum dome radiators,

Plus a pair of 2-ich MD system horn tweeters for the highs. Thanks to the use of specially constructed rugged voice coils, the system is able to handle up to 100 watts in power input.

 

Multi-Directional System

This is a new way of mounting individual speaker units inside a speaker system, to better reproduce in your own room the exciting liveliness or sense of "presence" experienced in a concert hall or jazz club. The MD System is based on increasing the interaction of sound waves by criss-crossing the sounds emitted by the individual speakers. This result in a unique sound field effect unobtainable by simply widening the dispersion of sound. In the MD System, midrange and tweeters are angle-mounted so that they produce an acoustic interference fringe - a whirlpool of sound - inside the listening room.

 

Newly Designed Woofer

The newly developed high-cut type woofer of the SP-3500 permits the output signal of the amplifier to be fed directly into the woofer, bypassing the crossover network. The result is a very smooth frequency response even at very low frequencies, which in turn results in extremely well-damped rich bass sound. This special design is unique with Sansui. Another outstanding advantage of this woofer is found in its high Compliance. The woofer achieves a stable piston action with superior transient response even in the face of big power inputs. Quality copper coil, aluminum bobbin, and a cone of carefully selected pulp help to improve the speaker's frequency response as well as its sound diffusion at extremely low frequencies.

 

Horn Midrange

Sansui engineers have placed a lot of emphasis on the midranges - those important frequencies where the vast majority of musical instruments perform - in the SP-3500. one of the speakers used is a 4-1/2- by 2-inch midrange for the frequencies from 2,000 to 6,500 Hz. While the cut-off frequency of this speaker is set as low as 800 Hz, it is intentionally used in the higher frequencies to eliminate the obnoxious metallic feeling unique to a horn speaker. A short-cut, exponential type die-cast from aluminum, this speaker is fronted with a sound dispersion characteristics. It also utilizes a 25 mm diameter titan diaphragm for top timbre qualities.

 

Cone Midranges

Two 4-inch cone midranges are mounted at an interior angle of 15 degrees to the front as a part of the SP-3500's MD System. Together with the horn midrange speaker, they handle the midrange sound in an "acoustic staggering system" for greater depth and richness of reproduced  sound. Each of the cone speakers has a newly developed concave aluminum dome radiator directly mounted on its voice coil bobbin. This permits a very smooth transition to the tweeters with virtually no phase agitation, and helps to improve the diffusion of reproduced sound as well. Designed to effectively diffuse radiator heat, each speaker is able to withstand big power input. The rear of each speaker is sealed with big-cavity plastic covers lined with abundant acetate sound absorbent to completely prevent woofer interference.

 

Tweeters

The SP-3500 also employs a pair of horn tweeters. Positioned just like the cone midranges, the two achieve the excellent sound dispersion qualities unique to the MD System. Each tweeter is a new concept horn speaker which is responsible only for frequencies over 6,500 Hz. Transition to the midranges is exceptionally smooth. Each tweeter make use of a 19 mm diameter polyester diaphragm to realize pleasant, ight and transparent timbre.

 

Newly Developed Crossover Network

The SP-3500 is equipped with a high-performance Loudness Contour type network utilizing an ideal E-type ferrite core and a printed circuit board for greater reliability. In addition, it is provided with level controls for the midranges and tweeters/ of a unique 3-step (Soft, natural and Clear) "tap-down" switch design, these permit accurate level control and are relatively free from the faulty contact and performance-deterioration so common to the previous resistor-type attenuators. They permit selecting the tonal quality best suited to the acoustic condition of the room or the listener's preference.

 

Bass-Reflex Type Chipboard Enclosure

The speaker enclosure adopts a damped bass reflex design, making use of two pipe ducts and combining the advantages of both the air suspension and bass reflex designs. It completely avoids an unnatural increase in sound pressure at low frequencies and unpleasant "cabinet resonance", and offers a flat frequency characteristic and a very low distortion factor. Manufactured of solid chipboard, covered with open=pore finished natural walnut, the rugged enclosure is able to reproduce the heavy rich bass of a pipe organ or any other instrument.

 

Curved Kumiko Fretwork Grille

The SP-3500 is graced with a beautiful hand-carved "Kumiko" fretwork grille like other Sansui speaker systems. The difference, however, is that it is curved for still better appearance and a sound diffusing effect. It adds to the decor of the room more than ever.

 

Pushbutton Connection Terminals

Connections are made almost effortless with the SP-3500, thanks to the adoption of fool-proof one-touch pushbutton type connection terminals; just push the terminal button, put end wires in opening, and release button. This system also minimizes the possibility of short circuits at the speaker terminals

 

Specifications

Speakers

Woofer :  1 x 350 mm (14")

Midrange 1  : 2 x 100 mm (4") cone-type

Midrange 2 :  1 x 100x50 mm (4" x 2") horn-type

Tweeter :  2 x 50 mm (2") horn-type

Power rating:  100 W (Peak)

Impedance:  8 Ω

Sensitivity:  100 dB/1W/1m distance

Frequency Range:  40 - 20,000 Hz (anechoic chamber)

25 - 20,000 Hz (normal listening room)

Crossover Network:  4-way 12 dB/oct parallel type

Crossover Frequencies:  700 Hz; 2,000 Hz; 6,500 Hz

Dimensions (H x W x D):  640 x 450 x 2905 mm (25-1/4" x 17-3/4" x 11-7/8")

Weight: 26,4 kg (58,1 lbs)

Finish: Walnut open pore

 

Sansui SP-2500 speakers

3-way, 5-speaker Multi-directional speaker system

Here's a powerful 80 watt speaker system that's as up-to-date as tomorrow when it comes to handling complex sound reproduction chores for the increasingly more sophisticated stereo systems now coming onto the market.. The SP-2500, for example, features a brand new speaker mounting method and unique, curved "Kumiko" hand-carved fretwork grille which contributes greatly to better reproduction of the sound field, a "must" in the New Wave 4-channel stereo that is so rapidly sweeping the stereo world. The new mounting method, in this Multi-Direction (or MD) system, succeeds in recreating inside the listening room the complex interference of sound waves normally present in a natural sound field. This is achieved by angle-mounting certain of the speakers to set up an interference fringe - a whirpool of sound - inside the room, which makes possible a unique effect that cannot be obtained simply by greater sound dispersion. Moreover, this elegantly-crafted hi-fi system also adopts a newly developed mechanical high-cut type woofer which ensures smooth frequency response even at very low frequencies., and a high-performance Loudness Contour type crossover network for distinctly superior damping characteristics, and better transient response.

 

3-Way, 5-Speaker, 80 Watts

The SP-2500 is of a 3-way 5-speaker design, consisting of a 12-inch mechanical high-cut type, high-compliance woofer, a pair of "multi-directional" 5 -inch cone midranges with aluminum dome radiators, a nd a pair of horn tweeters with an acoustic lens (diffuser). Thanks to the use of specially constructed voice coils, the system is able to handle up to 80 watts in power input.

Multi-Directional System

The SP-2500 features a radically new speaker mounting method which establishes it as a Multi-Direction or MD system. By angling the positions of the individual midranges and/or tweeters, Sansui's engineers have succeeded in producing what they call an acoustic interference fringe - a whirpool of sound - within the listening room. The result is an exciting new liveliness or sense of "presence" than was ever before possible, and which is right in step with the new industry trend away from reproduction of sound source points and toward recreation of the entire sound field.

Newly Developed Woofer

The mechanical high-cut woofer of the SP-2500, a unique new Sansui development, ensure a smooth frequency response even at very low frequencies, which in turn results in extremely well-damped rich bass sound. The new design permits the output signal of the amplifier to be directly fed into the woofer, bypassing the crossover network, and thus substantially improving the quality of reproduced sound.

High-Compliance Design

The woofer incorporates a large 145 mm Ø x 18 mm ferrite magnet to achieve stable piston action with superior transient response even in the face of big power inputs. Quality copper wire, aluminum bobbin and a cone of carefully-selected pulp used in the construction help contribute to the woofer's very impressive performance.

Midranges

The Sp-2500 employs a pair of 5-inch cone midrange speakers in Sansui's unique "multi-direction" design. Each has a newly developed concave aluminum dome radiator directly mounted on its voice coil bobbin. This design permits a very smooth transition to the tweeters, with virtually no phase agitation, and helps to improve the diffusion of reproduced sound as well. The voice coil, of expensive copper-clad aluminum wire, moves very smoothly, achieving a flat frequency characteristics and good transient response. Designed to effectively diffuse the radiated heat, each speaker is able to withstand big power input. The speakers are sealed with big-cavity plastic covers lined with abundant acetate sound absorbent to completely prevent interference with the woofer. Frequency response near the woofer crossover is consequently very smooth.

Tweeters

The SP-2500 also employs a pair of horn tweeters. Positioned in a vertical row, they offer a unique "ton saule" effect, while the adjacent sound diffuser achieves an acoustic lens effect. Together the effects substantially improve sound diffusion in the horizontal direction. This naturally adds to the sound field effect afforded by the "multi-direction" design of the midranges, and helps to create a still more lifelike sound field in the listening room. Each tweeter is a unique, new concept horn speaker which cuts short the aluminum die0cast horn and uses only the high-range portion. Though its low-range response extends down to near 2 kHz, it is made responsible only for frequencies over 6,5 kHz. Small wonder the transition to the midranges is so smooth the listener hardly senses the existence of the tweeters. Each tweeter makes use of a 19mm Ø polyester diaphragm to realize pleasant, light and transparent timbre.

 

Newly Developed Crossover Network

The SP-2500 is equipped with a high-performance Loudness Contour type network which utilizes an ideal E-type ferrite core and is designed as a printed circuit board for greater reliability. In addition, it is provided with level controls for the midranges and tweeters/ of a unique 3-step (Soft, natural and Clear) "tap-down" switch design, these permit accurate level control and are relatively free from the faulty contact and performance-deterioration so common to the previous resistor-type attenuators. They permit selecting the tonal quality best suited to the acoustic condition of the room or the listener's preference.

Damped Bass Reflex Chipboard Enclosure

The speaker enclosure adopts a damped bass reflex design, making use of two pipe ducts and combining the advantages of both the air suspension and bass reflex designs. It completely avoids an unnatural increase in sound pressure at low frequencies and unpleasant "cabinet resonance", and offers a flat frequency characteristic and a very low distortion factor. Of solid chipboard, covered with open=pore finished natural walnut, the rugged cabinet is able to reproduce the heavy rich bass of a pipe organ or any other instrument.

Beautiful Curved Kumiko Fretwork Grille

The SP-2500 is graced with a beautiful hand-carved "Kumiko" fretwork grille like other Sansui speaker systems. The difference, however, is that it is curved for still better appearance and a sound diffusing effect. It adds to the decor of the room more than ever.

Pushbutton Connection Terminals

Connections are made almost effortless with the Sp-2500,thanks to the adoption of fool-proof one-touch pushbutton type connection terminals; just push the terminal button, put end wires in opening, and release button. This system also minimizes the possibility of short circuits at the speaker terminals

 

Specifications

Speakers

Woofer :  1 x 300 mm (12")

Midrange : 2 x 125 mm (5") cone-type

Tweeter :  2 x 50 mm (2") horn-type

Power rating:  80 W (Peak)

Impedance:  8 Ω

Sensitivity:  98 dB/1W/1m distance

Frequency Range:  50 - 20,000 Hz (anechoic chamber)

30 - 20,000 Hz (normal listening room)

Crossover Network:  3-way 12 dB/oct parallel type

Crossover Frequencies:  700 Hz; 6,500 Hz

Dimensions (H x W x D):  640 x 425 x 275 mm (25-1/4" x 16-3/4" x 10-7/8")

Weight: 23,3 kg (51,3 lbs)

Finish: Walnut open pore

 

Sony PT-V5 timer

Moderately-priced flexible Program Timer

Key selling feature: Flexibility

The Sony PT-V5 offers your customers more flexibility than any other timer in this price range. Of course, it does the basic functions they expect in a timer; it turns the high fidelity system on and off for unattended recording of radio broadcasts. In addition, it can be used as wake-up timer - getting your customers out of bed with both the music from the system and/or alarm sound from the timer itself. More than that, a novel "ready" function sets the alarm to sound after a predetermined interval, from 1 to 59 minutes after actuation.

Key Demonstration

The operation of program takes some getting used to. Rather than doing a step-by-step operating demo, you should explain the benefits of the timer. If your customer has a cassette deck, explain that he can record FM programs even when he's not at home, he can use the timer to wake up to music on his system. And he can use the "ready" function as an interval timer during the day.

 

Convenience Features:

One-day , four-event programming capability

Microprocessor control for easy operation

Fluorescent digital display indicates time of day or program preset times

"Conversational" Programming - the flashing display segments guide you to the next function to enter

Sleep Timer enables you to go to sleep with 1 to 59 minutes of music, turns system off automatically.

Ready function sounds alarm from 1 to 59 minutes after time of actuation, enables you to time your activities during the day.

Membrane-style keypad.

Technology Features

Built-in rechargeable battery maintains clock and alarm times even during power blackouts (max. 1 hour)

Two AC outlets (one switched and one unswitched) supply power to your high fidelity system

 

Specifications

Clock System:  AC synchronous

AC Outlets:  1 x switched, 1 x unswitched; 900 Watts total

Power Requirements:  AC 120 V, 50/60 Hz

Power Consumption:  9 Watts

Dimensions (W x H x D):  355 x 55 x 245 mm (14" x 2-1/4" x 9-3/4")

Weight:  2,2 kg (4 lbs 14 oz)

 

Sony STR-VX450 receiver

High performance Direct Access Receiver with VCR capability

Features

Direct Access quartz frequency synthesis tuning

Audio-Video control center for easy connection with video equipment

Legato Linear amplifier circuitry

 

Key Selling Feature Audio-Video control

The integration of audio and video equipment is finally a reality. Stereo video-cassette recorders, stereo videodiscs and monitors are taking their places beside audio equipment. The STR-VX450 provides your customer with connection facilities for all these video systems. You can hook up two video sources, such as a VCR, videodisc, or monitor TV. Plus, you can even dub from one VCR, to another. The advantage? High fidelity sound. Not the flat, lifeless sound normally associated with video. Your customers obtain it simply and easily through the STR-VX450.

Key Demonstration

Assemble the most complete audio/video system possible Demonstrate a stereo video-cassette or videodisc with the Sony receiver and a pair of separate speakers. Make sure to pick an impressive program. Point out that the consumer needs this type of hookup to appreciate the full benefits of the video sound source. A/B with video playback through mono television speakers.

Convenience Features

Audio Video Control Center - permits hookup for TV picture and sound, stereo video-cassette recorders, stereo video-cassette players. Tape copy possible from VCR-2 to VCR-1

Direct Access - design operates like a calculator keypad. Select AM or FM, then enter the frequency numbers of the station. For instance, to tune 104,30 FM, enter FM, then punch in one-zero-four-three-zero.

10 station AM or FM presets - for fast , esy selection of your favorite station

Memory scan - provides a 4 second sample of each preset station

Station Card - insert to mark preset stations

Auto tuning - between FM stations

Fluorescent display - indicates station frequency and function

Memory backup system - retains settings - even if the receiver is unplugged

Connections for two audio tape decks - with tape copying possible

VCR audio dubbing capability

Speaker switch for A, B. A &B, OFF

Technology Features

Quartz frequency synthesis - provides the most accurate, the most convenient tuning available

Sony's exclusive Direct Comparator - provides exceptionally quiet FM reception

Impedance speaker switch - 8 Ω  / 4 Ω  for compatibility with all speaker types

Legat Linear - amplifier circuitry eliminates switching distortion and dramatically lowers crossover distortion

 

Specifications

Amplifier Section

Continuous Power Output (RMS)

40 watts per channel, both channels driven into 8 Ω  from 20 Hz to 20 kHz, at no more than rated Total Harmonic Distortion.

40 watts per channel, both channels driven into 4 Ω  from 20 Hz to 20 kHz, at no more than rated Total Harmonic Distortion.

Total Harmonic Distortion

0,008% from 20 Hz to 20 kHz , at rated output , 8 Ω

0,02% from 20 Hz to 20 kHz, at rated output, 4 Ω

Intermodulation Distortion

0,008% (60 Hz : 7 kh = 4:1) , at rated output , 8 Ω

0,02% (60 Hz : 7 kh = 4:1), at rated output, 4 Ω

Damping Factor:  35

Frequency Response

Phono : RIAA standard curve +0,5 dB -0,5 dB

Tape, Aux :  10 Hz - 70,000 Hz -1 dB

Video :  10 Hz - 70,000 Hz -1 dB

Input Sensitivity/Impedance

Phono:  2,5 mV/ 50 k Ω

Tape, Aux :  150 mV/50 k Ω

Video :  150 mV/50 K Ω

Signal-to-Noise Ratio

Phono :  77 dB (IHF-A); 75 dB (new IHF) at 2,5 mV

Tape, Aux :  100 dB (IHF-A); 80 dB (new IHF) at 150 mV

Video :   100 dB (IHF-A); 80 dB (new IHF) at 150 mV

Speaker Impedance

4 - 16 Ω  A or B

8 - 16 Ω  A and B

Tuner Section

Usable Sensitivity

Mono :  11,2 dBf 92,0 µV)

50 dB Quieting Sensitivity:

Mono :  17,3 dBf (4,0 µV)

Stereo :  38,3 dBf (45 µV)

Signal-to-Noise Ratio

Mono :  80 dB

Stereo :  75 dB

Total Harmonic Distortion at 1 kHz

Mono :  0,15%

Stereo :  0,25%

Alternate Channel Selectivity, 400 kHz :  60 dB

Frequency Response:  30 Hz - 15,000 Hz +0,5 dB -2 dB

Stereo Separation:  45 dB at 1 kHz

AM Suppression:  54 dB

AM Sensitivity:  300 µV/m (built-in antenna)

AM Signal-to-Noise Ratio:  54 dB at 50 µV/m

AM Selectivity:  40 dB

General

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

Power Consumption:  90 watts (UL)

Power Outlets:  100 Watts switched; 100 Watts unswitched

Dimensions (W x H x D):  430 x 105 x 305 mm (17" x 4-1/4" x 12-1/8")

Weight:  6,2 kg (13 lbs 11 oz)

 

Pioneer CT-5 cassette deck

Designed for Easy Operation

The CT-5 is designed for utmost ease of operation and control. Its IC logic-controlled tape transport provides touch operation and direct change of modes. The ALC - Automatic Level Control - may be switched in for fuss-free wide-dynamic-range recording. Music Search lets you find the song you want to hear easily.

The tape transport of the CT-5 is controlled by a logic circuit contained in a specially programmed IC . It determines the sequence in which "events" happen. To set the deck in the appropriate button. And we mean touch, because these are all light-touch mode buttons.

The record/play and erase heads are specially designed to match the exacting requirements of metal tape. Sendust reinforced permalloy is used for the former because of its excellent wear characteristics (over 1,000 abrasive hours of use), its resistance to saturation and its high reliability. The latter is a double-gap ferrite type, especially chosen for its high saturation magnetic flux density and high efficiency.

The bulit-in Dolby-C noise reduction system lets you enjoy truly dynamic musical reproduction, free of audible hiss. A switchable MPX (Multiplex) filter eliminates carrier leakage from a faulty tuner so that noise reduction is achieved correctly. Of note to convenience-oriented recordists are ALC and Music Search. ALC automatically adjust an incoming signal to its optimum level during recording so that on playback the program sounds dynamically full and free of objectionable distortion. If desired, the circuit may be switched out and the correct recording level manually set with assistance from the 6-LED bar-graph level display (one per channel). Music Search is a convenient feature that lets you easily locate the beginning of the program you 're presently listening to or the beginning of the next program.

Borrowed from the more expensive models, are such features as Auto Tape Selector, one-Touch recording and timer-assisted recording/playback.

 

Specifications

Systems:  Compact cassette, 2-channel stereo

Motor:  DC servo motor

Heads: 1 x record/playback Hard Permalloy heads; 1 x Erasing Ferrite head

Fast Winding Time:  approx.. 100 sec C-60 tape

Wow and Flutter:  no more than 0,05% (WRMS)

Frequency Response -20 dB Recording

Normal, LH Tape :  20 - 15,000 Hz (30 to 14,000 Hz ±3 dB)

CrO₂ Tape :  20 - 17,000 Hz (30 to 16,000 Hz ±3 dB)

Metal Tape :  20 - 18,000 Hz (30 to 17,000 Hz ±3 dB)

Signal-to-Noise Ratio

Dolby NR Off :  more than 50 dB

Dolny NR On :  more than 68 dB (Dolby-B); more than 78 dB (Dolby-C)

Total Harmonic Distortion:  no more than 1,2% (0db)

Input Sensitivity/impedance

Mic (L, R) :  0,3 mV/ 10 k Ω 

Maximum allowable Input Sensitivity :  57 mV (Ref. Mic impedance: 250 Ω  - 10 k Ω )

Line (x2) :  50 mV/ 100 k Ω

Maximum allowable Input Sensitivity :  22 V

Output Level/ Impedance

Line (x2) :  450 mV/50 k Ω

Headphones :  65 mV/ 8 Ω 

Maximum allowable Level :  160 mV

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

Power Consumption:  23 watts

Dimensions (W x H x D):  420 x 99,5 x 243,5 mm (16-916" x 3-15/16" x 9-9/16")

Weight:  4,5 kg (9 lb 15 oz)

 

Pioneer CT-4 cassette deck

A Basic Cassette Deck

The CT-4 from Pioneer is an exemplary cassette deck for novice recordists. It's loaded with features to facilitate recording and playback. A case in point is its "power-assisted" tape transport, a feature unusual in a deck in this price range.

Despite being Pioneer's least expensive model, the CT-4 offers touch-operated control buttons, not old-fashioned piano-key type levers. Making this feature possible is the "power-assisted" tape transport, an ingenious Pioneer design that exploits the natural inertia of the rotating flywheel to provide power for mode changes. Heavy-duty, pwer-consuming plungers have been entirely replaced by this simple and dependable mechanism.

As in the more expensive model, a special sendust-reinforces permalloy record/play head is combined with a double-gap ferrite erase head to form a perfect match for metal tape. Each features high wear resistance, low distortion and high reliability. Here's a description of some more features that prove that Pioneer's "basic" deck is not so basic. Set the deck in the play mode and touch the fast forward button.

You're automatically whisked to the beginning of the next selection. Touch the rewind button instead of fast forward and you're back at the beginning of the song currently playing. This amazing feature we call "Music Search". Recording begins by merely touching the record button; you don't need to push the play button at the same time. Recording Mute lets you make blanks between selections without touching the record level controls. If you so desire, you can couple this deck with an optional timer to make unattended recordings or wake up to taped music.

Last but far from least, two electronic features make your recordings sound better. One is the Dolby-C noise reduction system that reduces hiss and expands high-frequency response. The other is the 6-LED bar-graph display (one per channel) that warns of impending tape saturation distortion with electronic responsiveness. As you can see, Pioneer expects a lot from even their basics.

 

Specifications

Type: Single cassette tape deck

Track System:  4-track, 2-channel stereo

Tape Speed:  4.76 cm/s

Heads:  1 x record/playback, 1 x erase

Motor:  Electronically controlled DC Servo Motor

Tape Type:  type I (Normal), CrO2, Metal

Noise Reduction:  B, C

Frequency Response:

Normal Tape : 25 - 14,000 Hz

CrO₂ Tape : 25 - 16,000 Hz

Metal Tape : 25 - 17,000 Hz

Signal to Noise Ratio:  57 dB

Wow and Flutter:  0.05%

Total Harmonic Distortion:  1.2%

Input:

Line : 60 mV

Mic :  0.3 mV / 30 k ohm

Output

Line:  450 mV / 50 k Ω

Headphones :  63-90 mV / 8 Ω  

DIN Play/Rec Socket :  12 mV

Power consumption: 16 W

Dimensions (WxHxD): 420 x 120 x 245 mm

Weight:  4.4 kg

 

Dual 728Q turntable

Quartz PLL direct drive, fully automatic operation, and Dual's s exclusive Ultra Low Mass tonearm system

Dual exclusive features

ULM tonearm and cartridge system: less than 8 grams total effective mass

New XM300 alloy increases rigidity, reduces resonance

Hydrodynamic suspension system for tonearm, motor and platter

Turntable acoustic isolators minimize acoustic feedback and external shock

Tunable anti-resonance filter with viscous damping

HDC (High Damping Compound) housing provides high internal damping and suppresses external interference

Unique dust-cover hinges allow placement close to rear wall

 

The moment the ULM tonearms touches down on your record, you will appreciate what Dual engineers have accomplished. You will hear a purity of tone that has never before emerged from the grooves. Even if the record is warped.

 

The Ultra Low Mass. tonearm

The Dual straight-line tubular tonearm is suspended in a four-point gyroscopic gimbal which centers and balances the tonearm mass where it pivots. The vernier-adjustable counterbalance establishes zero balance with micrometer-like precision. A tempered flat-wound spring applies tracking force at the pivot - without increasing effective mass. The tonearm remains in perfect dynamic balance throughout play, even if the turntable is not level.

The ULM tonearm can accommodate cartridges weighing as little as two grams. ULM cartridges made to Dual specifications weight only 3,5 grams, including mounting bracket and hardware.

 

ULM is Dual's exclusive Ultra Low Mass tonearm and cartridge system with total effe3ctive mass less than 8 grams. That's less than half the mass of conventional tonearm and cartridge combinations.

This major breakthrough by Dual has been acclaimed throughout the audio industry, especially by the independent test labs.

These labs have begun to use warped records as 'real-life' test instruments

One lab, after making the usual measurements, also listened to a record played by the sme ULM tonearm and cartridge system. There is no way measurements, or mere words, can describe the acoustic presence, highs re crystalline, with a purity we haven't heard before. The bass is so clean that one can hear new sounds from records, such as the harmonic vibration of unplayed strings on the double bass, overall definition and transient response were outstanding.

 

Hydrodynamic suspension system

Radically new design floats the tonearm , motor and platter as one unit on four cylinders, each filled with special viscous fluid. This system absorbs virtually all spurious energy originating in sound waves as well as vibrations caused by footfalls or other movements in the room.

Two suspension systems

There are two separate and independent suspension systems, each highly effective in isolating the tonearm from acoustic feedback and other music-muddying interferences. The Hydrodynamics system floats the tonearm, motor and platter as one unit on four accordion-like shock absorbers, each filled with a special viscous fluid.

The second suspension system incorporates four tunable acoustic isolators where other turntables simply have feet. Each of these isolators is adjustable to provide maximum protection from either acoustic feedback or external shock. No more tip-toeing across the room to keep the tonearm from jumping. And no more cutting the bass to eliminate feedback.

 

Tunable anti-resonance filter

Like all other systems with mass and compliance, tonearms and cartridges tend to vibrate and cause undesirable resonances. These resonances cannot be entirely eliminated, but unless minimized they cause power-draining subsonic woofer-cone movements. You hear the results as muddy bass. Dual engineers have solved this problem with the unique tunable anti-resonance filter.

Housed in the counter-balance, the anti-resonance filter can be precisely tuned to match the tonearm to the mass and compliance of all available cartridges. The tonearm is made of the special new XM300 aluminum/magnesium alloy which increases rigidity and reduces resonance.

 

Ultra Low Mass

Hydrodynamic suspension, tunable acoustic isolators, tunable anti-resonance filter - all important contributions leading to perfection in record playback. And all Dual exclusives. Equally important, the materials, the quality control exemplify all that has made Dual precision and reliability so highly regarded throughout the world.

 

Specifications

Tonearm

Effective Length:  8-3/4"

Bearing Friction:  0,007 grams

Total Effective Mass (with ULM cartridge):  less than8 grams

Cartridge Weight Range:  2 - 9 grams

Minimum Tracking Force:  0,25 grams

Anti-skating System :  Callibred for all styli

Tunable Anti-resonance Filter: yes

Four-Point Gimbal:  yes

Motor and Platter

Motor Type:  Quartz PLL

Drive System:  Direct

Platter Size:  12"

Illuminated Strobe:  yes

Operations

Automatic Start and Stop:  yes

Manual Start and Stop:  yes

Damped Cue-control:  yes

Pitch-control Range:  11%

Rumble:  better than78 dB

Wow and Flutter: ±0,0225%

Dimensions:  17-1/2" x 15-3/16" x 5-1/12"