Sansui SP-X9700 speakers

High-Resolution 4-Way, 7-Speaker System

Really Rich Bass - the 17-inch woofer has non resonant frame and a cone that could move mountains

If you could ut enough power into the Sansui SP-X9700  you probably could move mountains, or at least create a couple of man-sized quakes. As it is, the very high power capacity of the system is more than enough to handle most of today's mammoth power amps and receivers - 280 watts.

Woofer design and construction in such a large system naturally need to be fully up to state-of-the-art. Standards , if you want to avoid spurious vibration, excessive heat and the various kinds of distortion they lead to. Sansui forms the cone of a special pulp formulation, gives it a carefully calculated curvature, adds corrugations to break up damaging surface waves, and thus preserves all the dynamic punch of your music's "bottom end" with ease.

The bobbin in the woofer voice coil is of luminum for quick heat dissipation the coil itself is coated with a heat-resistant film. Together they provide high linearity up to a tested level of 200 degrees Celsius

For the magnetic circuit we've set a high flux density of 11,300 gauss and thus achieved mor-than-adequate drive and damping. Of special note is the concave recess at the top of the center pole, helping to keep the top plate magnetically saturated for the reduction of harmful 3rd harmonic distortion. Musicality is richer at all input levels.

Finely, frame dynamic were analysed in several prototype models until we eliminated destructive resonance. The entire woofer assembly is structurally sound - and no amount of high-amplitude input up to the rated capacity can cause "woofer buzz".

 

Close-up Midrange: Special Sansui techniques preserve the intimacy of vocals, fidelity of fundamentals.

High efficiency is just one of the design criteria met and surpassed by the 8-inch midrange speaker unit in the Sansui SP-X9700. to preserve the natural "close-up" feeling of vocals, and to retain a high degree of fidelity with the fundamentals of musical instruments, we chose a cone pulp mixture of highly elastic, thermally stable fibres.

The new method of pressing the cone has ensured a high Signal-to-Noise Ratio and a flat Frequency Response over the Frequency Range assigned to this unit. Sound transparency and crisp, intimate "presence" are the benefits,

For increased power handling, the same techniques used in the voice coil and magnetic circuit of the woofer are again employed here harmonic distortion is discouraged even when the maximum input of 280 watts is introduced over long period of time.

 

Cracklin Clean Highs: Well-defined high-frequency reproduction is sent into every corner of your room.

Dual horn tweeters cover the frequency range between where the midrange leaves off and the supertweeters take over. This is the high range where musical definition is determined for cymbals, reeds, strings and the upper harmonics of most other instruments, electric and electronic instruments included.

The two horn tweeter are identical, and are connected in parallel to increase efficiency and power handling capacity. Each has a powerful magnetic circuit and a phenol-resin diaphragm, a precision-machined zinc die-cast acoustic equalizer is positioned as closely as technically possible to the diaphragm to maintain phase integrity and extend the high-frequency limit. The drivers are then coupled to non-resonant zinc die-cast horns formed with sectoral fins to improve dispersion and transient response.

 

Triple Superteeters: What you can't hear Can hurt.

The three precision supertweeters in the Sansui SP-X9700 cover the extreme high-frequency range clear into the supersonics up to 23,000 Hz with accuracy and fidelity. You may argue that you can't hear the super-highs, but our tests have shown that when they are reproduced with integrity, the frequencies you Can hear come out cleaner, crisper and more musical.

Again special pulp is used in the cone diaphragms, which are then installed with mylar center caps for phase linearity. The two of supertweeters is mounted on a unique tri-sided projection on the front baffle so that the super-highs are bearned into every corner of your listening room.

 

Level Control: Special low-distortion network improves musicality.

Three positions are provided on the front-panel Level Control: Natural;  Soft-1, and Soft-2. its esy to match the speaker system's response to yur acoustic environment, using the Soft positions when you feel that highs are too "brilliant". The control works from a newly-designed crossover network featuring low electrical loss, high power handling and low distortion.

 

Real-Wood Grille: Sansui's traditional Kumiko design adds distinction

High-density "acoustic" particleboard forms the massive bass reflex enclosure of the SP-X9700 for resonance free reproduction. Standing waves are damped by two types of sound absorbent inside. The exterior cabinet is finished with simulated walunt grain and the removable real-wood grille, with a beautiful hand-carved traditional "Kumiko" pattern grille.

 

Specifications

Speakers

Woofer :  1 x 432 mm (17") cone-type

Midrange : 1 x 208 mm (8") cone-type

Tweeter :  2 x 171x59 mm (6-11/16" x 2-5/16") horn-type

Supertweeter 3 x 49 mm (1-15/16") cone type

Max. Input Power :  280 W

Impedance:  8 Ω

Sensitivity:  100 dB (JIS at 1m distance

Frequency Range:  22 - 30,000 Hz (normal listening room)

Crossover Network:  4-way, 16 dB/oct.  12 dB/oct;  6 dB/oct.

Crossover Frequencies:  1,000 Hz, 7000 Hz; 15,000 Hz

Dimensions (H x W x D):  688 x 470 x 270 mm (27-1/16" x 18-1/2" x 10-5/8")

Weight: 20,3 kg (44,8 lbs)

Finish: simulated Walnut grain

 

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

 

Sansui SS-10 headphones

High-Fidelity Stereo Headphone Set

The virtues of being alone have long been underrated. Or ware until Sansui decided to do something really meaningful about it. Now enter the SS-10 stereo headphone set, affectionately dedicated to those purists to whom stereo is indeed a very personal experience, ideally savored in princely solitude, far from the maddening crowd. Equipped with newly developed mechanical two-way speakers, this truly high-fidelity set reproduces a wide range of frequencies from very, very low to ultra-high with uniform smoothness. Few other stereo headphones on the market today are so discreet and so solicitous of your undisturbed listening pleasure. The SS-10 "direct line" set offers a host of attractive features, including separate volume controls for each channel, identical left and right channel characteristics, and hand-sewn so comfortable that it's a very wise investment from that standpoint alone. But Sansui is also very understanding about the pleasures of stereo sharing, and providently thought to make the "direct line" convertible to a "party line". So that on those occasions when there's something special you'd like someone special to hear with you, the SS-10 has a two-meter long Y-shaped extension cord equipped with two jacks for connecting two sets of headphones. But whether used in solitude, or adapted for sharing, the SS-10 stands alone as today's best buy in stereo headphones.

 

Mechanical 2-Way Speakers

The unique, newly developed mechanical 2-way speakers of the SS-10 utilize large 8 cm, special cone papers for the low and middle range notes, and quality polyester diaphragms that also cover the high ranges. These enable the SS-10 to reproduce sound with an absolute minimum of intermodulation and harmonic distortion and a maximum of transparency and resolution.

Wide Frequency Range

Thanks to the mechanical 2-way speakers, the SS-10 reproduces a wide 20 to 20,000 Hz range of sound, from well-damped, powerful rich heavy bass comparable to that reproduces by large speakers, to delicate, transparent treble, all with exceptional smoothness.

Identical Channel Characteristics

The SS-10 is designed to minimize the difference in tonal quality and output sound pressure level between the left and right channels, enabling you to enjoy well-balanced stereo sound. Further, unlike speaker systems, a stereo headphone set completely separates the left and right channel sounds, so that the stereo separation is exceptional.

Separate Volume Controls

Equipped with a volume control on each ear pad, the SS-10 saves you the trouble of standing up and walking over to the amplifier each time you wish to adjust the sound volume. It;s especially convenient when you are sitting far away from the amplifier using the extension cord supplied.

Since the left and right channels can be separately adjusted , adjustment of stereo balance is also easily accomplished.

y-Shaped Extension Cord with Two Jacks

The SS-10 comes complete with a 2 meter long extension cord to let you relax away from the amplifier or tape deck. This cord is provided with two jacks for connecting two stereo headphones sets, so two persons can listen together.

Spiral Cord

The connection cord of the SS-10 is of the same curled spiral type as that used with telephones. Though as long as 3 meters, it never gets in your way.

Hand-Sewn Ear Pads

Made of specially-treated soft plastic, the SS-10's ear pads cover the ears very softly and do not exert uncomfortable pressure on the wearer. These comfortable pads seal out external sound and will not tire the wearer even after hours of continuous listening

Easy-to Use, Functional Design

The length of the head band can be freely adjusted to suit the size of the head or ear positions of each individual.

 

Specifications

Speakers:  80 mm (3-3/16") mechanical 2-way

Max. Input:  500 mW

Impedance:  8 Ω

Frequency Response:  20 - 20,000 Hz

Sound Pressure Level:  Over 110 dB

Cord Length:

Main Cord:  Spiral type 3 m (9,8 ft.)

Extension Cord: Straight type 2 m (6,5 ft.)

Weight:   625 grams (22 oz)

 

Sansui SS-100 headphones

Omni-Dynamic Stereo Headphones

Sansui gives stereo music listeners the rich bass of dynamic acoustic transducers as well as the wide frequency range and brilliant musical reproduction qualities of the electrostatic types in these all-new, smartly designed SS-100 stereo headphones.

"Omni" means that the diaphragms inside the comfortably fitting earpieces each distribute a uniform driving force over its entire flat surface, avoiding split vibrations. The low mass of each diaphragm also means less total harmonic distortion and less phase distortion - the same advantages you have with electrostatic drivers. But since the SS-100 design is essentially dynamic , no electrostatic adaptor or special amplifier is required, and you enjoy a natural yet powerful bass reproduction as well.

With the Sansui Omni-Dynamic SS-100, frequency response is flat over the entire musical spectrum from superlows to ultrahighs. Harmonic distortion is minimal, impedance is flat with no trace of peaks or dips, and your amplifier or receiver is shown off at its best without overstraining.

 

Omni-Dynamic Principle

These handsome, Sansui-exclusive headphones employ an omni-dynamic transducer (diaphragm) in each earpiece. The units are made of polyester film, stretched to a uniform tautness and contained between two anisotropic magnet plates (Fig.1.) On the diaphragm film is etched a voice coil pattern (Fig. 2) And each of the magnet plates has a field (Fig. 3) which, when activated by the plus and minus pulsations of the musical input signal, moves the diaphragm to end from based on Fleming's left-hand rule as applies to current flow in coils.

 

Driver Construction

Omni-Dynamic Driver

As they are very thin and low in mass, the diaphragms offer excellent transient characteristics over a wider frequency range than can those shaped as cones or domes. This means you have a flat response from the superlows to ultrahighs with any musical input signal. Omni-dynamic drive means, too, that all sections of the diaphragm surfaces move in linear piston motion, without split vibrations, thus reducing harmonic distortion and extending dynamic range.

Powerful Magnets

The anisotropic magnet plates in the SS-100 each have high magnetic density to afford the headphones the very high sensitivity (efficiency) of 94 dB/mW.

Optimum Amplifier Load

Since the impedance of these headphones is literally constant at all frequencies, your amplifier or receiver is asked only to deliver an optimum load, meaning that you are assured of the best sound quality from your unit

No-Adaptor Design

To drive the SS-100 simply plug in the provided jack at the headphone outlet on your amplifier or receiver. No AC power booster or other adaptor is required.

 

Fatigue-Free Design

Comfortable Wearing

Eight neoprene supports separate the earpiece from the headband assembly, increasing wearing comfort. The earpads are soft and slim-silhouetted for further comfort, and the recess inside each is shaped to optimize air compliance for better musical reproduction, even into the very high frequency range.

Clear Channel Identification

You'll never confuse front and back or left and right two clearly-marked arrows point to the front of the headset, and only the left earpiece has a cable cord, both for channel identification and wearing comfort.

Slim Design Throughout

Since these Sansui-exclusive Omni-Dynamic drivers themselves are flat, thin and compact, the earpieces have been designed to present a slim silhouette. other design elements take up this low profile motif to result in a modern and quite comfortable stereo headphone set you'll enjoy for long years of hard use.

 

Specifications

Speaker:  Omni-dynamic driver 67 mm (2-5/8)") full-range type

Matching Amplifier Impedance:  4 - 100 Ω

Impedance:  60 Ω  nominal

Frequency Response Range:  20 - 20,000 Hz

Total Harmonic Distortion :  less than 0,3% (at 94 dB SPL)

Max. Input Power:  250 mW

Sensitivity:  94 dB/mW (at 200 Hz)

Cord Length:  2 m (6,5 ft) coiled

Weight (Headphones only):  380 g (13,2 oz)

 

Sansui SR-535 turntable

Automatic Direct-Drive Turntable

Sansui wants everyone to enjoy hi-fi music with the minimum possible noise, distortion and inconvenience. That's why the Sansui SR-535 automatic direct-drive turntable puts the emphasis on pure hi-fi performance and true handling ease. Accuracy of platter rotation, and a strong, anti-howl construction characteristics in the musical department. The direct-drive motor is a high-torque type and the special tonearm has a unique support to ensure delicate performance. Record reproduction is always clean and pure.

One simple control, the Auto/Manual Play Lever, does all the work. Put a record on the platter, set the record-size selector and pull the lever once; the tonearm is lifted, moved and gently lowered to the lead-in groove, when the record ends, the arm is returned to its rest and power shuts off automatically. The same lever permits manual play when desired. More convenience is offered in the Repeat facility permitting you to select one to five replays, or infinite replay.

 

Automatic Operation

One control knob does it all. The jumbo-sized Auto/Manual Play Lever has three positions of Manual On, Off, Auto Start/Stop. For a single automatic play, you simply place a record on the platter and gently pull the Auto/Manual lever into the Auto Start/Stop position. The tonearm lifts automatically as the platter begins to spin, the stylus is placed over the lead-in groove of the record, and the tonearm descends to begin play. If you desire to interrupt play at any time, simply pull the lever again, or you may wait till the record ends. In either case, the arm is automatically lifted  and returned to its rest, and power is switched off, all without your assistance.

When manual play is desired, simply set the control lever to the Manual On position. When the platter begins to rotate, move the stylus to over the part of the record you want to hear. An oil-damped Cueing Lever is provided to help you avoid damaging your valuable records. As in Auto Play, the Manual position on the lever allows the automatic return mechanism to return the tonearm to its rest.

Additional convenience Auto Repeat control on the SR-535.

In the Off position if sets the turntable in auto-return mode. Or, you can select from "1" to "5" repeat plays, or "infinite" which allows the automatic mechanism to continuously repeat its simple job until you change the repeat control settings.

 

Accurate Drive System

Sansui engineers have done if again. The platter of the Sr-535 never shows any appreciable slow-down under reasonable loads. This means that your 33-⅓ and 45 rpm records are always played at the correct speeds for best musical performance. This accuracy is assured by an advanced, high-torque, 20-pole/30-slot brushless DC type servo motor for direct drive. Speed drift is effectively eliminated by the Sansui-exclusive rotor position sensor mechanism, coupled with the motor's bias-controlled saturable core (Sansui Pat. Pend). Thanks to the dependable power supply, the drive voltage is kept constant for accuracy under any conditions.

Mechanically, as well as electrically, the SR-535 has impressive precision. All components and parts are designed, machined and assembled under very careful super-vision to live up to Sansui's strict quality control standards. The bearing sleeve is mirror finished for complete roundness, for instance. The motor shaft/center spindle is formed of the finest polished carbon-chrome steel and rides in a thrust bearing of tough friction-resisting synthetic polyamide. We've used a special lubricant, one developed by the aerospace industry, to ensure low friction in the motor over long years of operation.

Smoother rotation is also ensured by the heavy (1,4 kg ) aluminum die-cast platter. This, plus Sansui's attention to every minor point in design and construction, gives the Sr-535 impressive specifications low 0,038% wo/flutter and better than 67 dB rumble.

Fine speed adjustment with strobe

On the edge of the oversized (31,8 cm or just over 12-inch) platter there are four rows of stroboscopic patterns, two each for both speeds to permit fine adjustment when your electrical power is either 50 Hz or 60 Hz. The strobe light illuminates the platter edge so that you can visually check its rotation speed for accuracy. Once the correct speed is reached, the speeds will continue to spin accurately, or you can use two fine speed controls to vary platter by as much as ±3,5% from the standard speeds. By the way, these controls are recessed to avoid accidental speed change.

 

Stabilized Tonearm

Exceptionally high tonearm stability is one of the reasons the Sansui Sr-535 performs with such high musicality. Despite the attractive price of this fully automatic turntable, the tonearm has the same stability and resistance to resonance found in much more expensive models. Spurious vertical travel and harmful torsion or twisting are avoided by a special support with two vertical pivots. The mass of the arm is concentrated at these points to clearly define the unit's fulcrum for better mechanical advantages, particularly in the bass frequencies which are delivered from your record free of "mud".

Low-resonance design

Resonance is further suppressed by the special acoustic absorbent, we use inside the highly rigid tonearm tubing. Then, we've decoupled the balance weight from the arm shaft vis a newly designed rubber damper. All types of vibration whether  transmitted through the air or through the physical structure, are shut out before reach the stylus.

Other tonearm features:

Zinc-alloy die-cast arm base; a massive heavy structure to improve bass response by firmly securing the arm to the cabinet.

Direct readout tracking force dial; precision-calibrated markings every 0,25grams one rotation covers 0-to-3 gram range

Gold-plated connection pins; free from all forms of rust to ensure maximum transfer of the tiny electrical signals from cartridge to your amplifier

Arm lifter lever; oil damped for smooth operation

Anti-skate knob; adjustable even as the record is played, another bonus in this attractively priced turntable.

 

Cabinet

Sansui designers take special pride in the clean, modernistic looks of the SR-535 turntable. The silver metallic finish sets off the precision lines of the cabinet and is just "flat" enough to resist glare from room lights without appearing too dull. The clean lines are more than good looking, advanced computer technology and time-tested carpentry techniques alike were used in designing the Sr-535 to resist acoustic feedback or "howling". The automatic mechanism is mounted on a separate chassis inside the cabinet for instance while the low-profile of the base and its complex suspension system further ensure good sound.

Complex-suspension

To defeat all types of vibration before they can harm your music, the SR-535 is suspended in a complex system of rubber and spring devices. Air-borne vibration, such as sound-waves from your speakers, and structure-borne vibrations, such as originating from your operation of amplifier or receiver controls, from footsteps, etc. Are effectively damped so that your music retains its tight bass, clean mids and crisp highs.

 

Specifications

Type:  two-speed, direct-drive automatic turntable

Motor:  20-pole, 30-slot DC brushless

Drive System:  Direct spindle drive electronically servo controlled

Platter:  318 mm aluminum alloy die-cast

Platter Weight:  1,4 kg (3,1 lbs)

Wow and Flutter:  less than 0,038% WRMS

Signal-to-Noise Ratio (IEC-B) :  better than 57 dB

Rumble (DIN-B) :  better than -67 dB

Speeds:  33-⅓ and 45 rpm

Fine Speed Adjustment:  ±3,5%

Tonearm:  Statically-balanced S-shaped tonearm with two-point pivot support

Length:  220 mm pivot to stylus tip

Overhang:  17,5 mm

Offset Angle:  24,5°

Minimum Tracking Force Setting:  0,8g (when using cartridge guaranteed to operate at 0,8g stylus pressure)

Acceptable Cartridge Weight:  4 to 10 g

Cabinetry: Slim line cabinet with anti-howling insulators and hinged free-stop dust cover

Cartridge:  Sc-50

Type :  Intermodulation Distortion type

Frequency Response:  10 to 20,000 Hz

Output Voltage:  3 mV per channel (1,000 Hz , 35,4 mm/sec)

Optimum Load:  47 k Ω

Tracking Force:  2,5 g ±0,4 g

Stylus:  0,6 mil diamond spherical (SN-50)

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

Power Consumption:  less than 9 watts

Dimensions (W x H x D):  460 x 166 x 370 mm (18-1/8" x 6-3/16" x 14-9/16")

Weight:  9,2 kg (23,6 lbs) packed

 

Sansui FR-4060 turntable

Electronic Automatic Transcription Turntable

Stereo purists who still claim only a manually-operated turntable can faithfully reproduce disc recordings without strain have some catching up to do. For here is a turntable - a fully automated transcription turntable - which performs with the ease and stress-free operation of a first-class manual but has the convenience and practicality of an automatic as well. The Sansui FR-4060 very efficiently eliminates the one major disadvantage of the complicated :changer-type" turntable by employing a non-mechanical, purely electric device, the galvano-magnetic detection mechanism, to detect the end of a record and prepare the tonearm for automatic operation. It makes it possible for the tonearm to ride completely free of stress-producing mechanical linkage systems until it is time for the automatic lead-in, return, repeat or cut operations to take over. In this way, the stylus is protected from distortion-producing lateral thrust, your records are safeguarded just as they would be on a manual, and since the tonearm is free, it can be moved to any part of the record manually, even during automatic play.

 

 

The Frequency Response-4060 features an unusually sensitive S-shaped tonearm, a newly developed Sansui SV27 magnetic cartridge with superb tonal characteristics, a special low-capacitance output cable, floating-mount base and platter design and many other original Sansui quality details. It is also fitted with a connection socket for the Sansui SRC-6 control unit (optional) for full remote-control of all automatic functions.

Those stereo purists who maintain that a manual turntable is the epitome of perfection have only to check out the FR-4060. by adding the convenience of automatic operation to one of the finest precision manuals ever created. Sansui has come up with a turntable to fully satisfy your specific needs.

 

Specifications

Type:  Two-speed, two-motor, belt-driven automatic turntable

Operation Modes:  Manual, Automatic (lead-in, return/stop, repeat, cut)

Speeds: 33-⅓ and 45 rpm

Platter:  Aluminum alloy die-cast, diameter 300 mm (12") weight 1,7 kg (3,8 lbs)

Motor:  Four-pole synchronous for platter drive, 16-pole (3-rpm) geared synchronous for automatic operation

Wow and Flutter: less than 0,06% (WRMS)
Signal-to-Noise Ratio  better than 50 dB

Tonearm:  Statically balanced S-shaped tubular with universal shell connector

Tonearm Length:  220 mm

Overhang:  15 mm

Tracking Force Setting:  Adjustable within 0 - 3 g

Applicable Cartridge Weight:  4 - 20 g

Cartridge:  External Moving Magnet Type Sansui SV-27

Frequency Response:  10 - 223,000 Hz

Stylus Compliance:  20 x 10 ¯⁶cm/dyne, static

Output Voltage:  3,5 mV per channel (1,000 Hz , 50 mm/sec)

Optimum Tracking Force:  1,5 - 2,0 g

Stylus:  0,5 mil diamond, Sansui SN-27

Cabinet:  Walnut finish wooden cabinet with hinged free-stop acrylic dustcover

Power Requirements:  120, 240 V 50/60 Hz

Power Consumption:  13 W

Dimensions (W x H x D):  469 x 204 x 381 mm (18-1/2" x 8" x 15")

Weight:  10,6 kg ( 23,4 lbs)

 

Sansui TU-919 tuner

Sansui Patented Digitally Quartz-Locked FM/AM Stereo Tuner with Impeccable Drift-Free Tuning Accuracy.

FM Fronted Sensitivity; Enhanced by low-noise Dual-Gate MOS FET and 5-gang Tuning capacitor

The extraordinary tonal quality of the Sansui TU-919 begins here. Crossmodulation and interference are avoided in the FM fronted using a low-noise Dual-Gate MOS FET RF amp and a wide-gap, frequency-linear 5-Gang variable capacitor of high precision. The 50 dB Quieting Sensitivity is an excellent 13,5 dBf (mono) and 35,5 dBf (stereo)

 

FM IF Selectivity; Very low group delay means much-improved sound.

Tonal quality is further enhanced by flattening transient group delay and phase distortion to achieve higher selectivity with lower distortion in the FM IF section. The real test of our IF circuitry comes when inputs from your antenna vary unpredictably in level.

Actual field tests show the effectiveness of the ten differential IF stages, contained in one Darlington-connected differential IC, and the linear-phase ceramic filters found here. Changes in signal level have hardly any effect on selectivity.

 

Patented Variable Group-Delay Equalizer; Distortion is further reduced

This is a unique device that permits the independent adjustment of the equivalent amount of Frequency Response of the IF signal within the bandwidth. This, in turn, helps eliminate any deviation, however minute, in group-deley response within the bandwidth. Higher Signal-to-Noise Ratio and lower distortion are also achieved.

 

FM Stereo Sound; Wider separation and purer fidelity from PLL

Stereo FM broadcasts are multiplexed with a "pilot" signal to trigger receiving tuners into the stereo mode and enable them to "decpde" the composite signal into left and right channels.  Once its job is done, that "pilot" (a 19 kHz signal) must be entirely removed from the audio signal. The conventional filter used for this can cause more problems than it prevents.

Such 19 kHz filters are usually positioned at the output of the stereo demodulator. Together with the "pilot" they also often filter out the upper end of the frequency response and cause phase distortion as well. Sansui avoids such filters in the TU-010 for a more musical sound.

Our stereo dempdulator is a PLL type with a special "pilot" cancelling circuit (not a filter) included in its IC. It eliminates the 19 kHz signal before it enters the switching or demodulation stage. Output of the demodulator amp is pure audio.

 

Wide-Range DC Configuration; More guarantees of cleaner sound.

As in the highly advanced Sansui AU amplifiers and our best Pure Power receivers, the DC amplifier configuration in the TU-919 offers cleaner audio reproduction in both AM and FM. Main advantages are; Wider dynamic range; Lower TIM distortion; and Superb frequency response all are vital to hi-fi. These parameters are made still more dependable by our reduction of the internal power-supply impedance across the widest possible frequency range. Reproduction is always well balanced.

 

Power Supply: Attention given to better sound localization

An error-correction/amplification constant-voltage circuit of an entirely new type is found in the power supply of the TU-919. it provides unfailing power regulation for constantly high performance quality. With impedance low throughout, musical textures remain crystal clear and sound-image localization in the reproduced sound field is the sharpest possible.

 

High-Power Drive Ratio Detectr; S/N and linearity are improved

A newly-developed, wide-range, high-power drive ratio detector, driven by a triple-base Darlington-connected IC, is used in the FM discriminator. It contributes to improved linearity and Signal-to-Noise Ratio. For more stability and still less noise we've housed the discriminator in a shielded casing, separate from the IF circuit.

 

Selectable IF Band for AM; Wide/Narrow improves reception

By broadening the signal-passing bandwidth in the AM tuner section, frequency range is dramatically improved. For this reason, you'll want to use the Wide position on the IF bandwidth selector. When the station to which you have tuned is strong enough, the results in improved high frequency response are impressive. On the other hand, weak or distant AM stations are received more clearly when you use the Narrow position; the interference caused by stronger station broadcasting on adjacent frequencies is dramatically lowered.

 

Sansui Exclusive FM Digitally Quartz-Locked System; Contained in a single LSI

We've combined a quartz crystal, providing a rock-steady reference base, with an error-free digital control in the TU919. this Sansui-exclusive system detects any tuning error caused by temperature, voltage and humidity changes and compensates for it instantly. Drift is now a thing of the past. Most other quartz tuners use analog phase reference controls that compare phase of two frequencies between the local oscillators and quartz crystals. In order to check and correct errors (drift). But our TU-919 doesn't instead it has a digital control system.

With it the frequency counter samples the local oscillator's frequency constantly, once every 0,01 seconds, timed by the accurate quartz. When there's an error, it's converted to digital units, which are then converted to voltage to control the local oscillator. When there's no error, the tuned frequency is locked to the station's frequency.

Sansui's digital processing doesn't use the kind of reference signal containing infinite harmonics; therefore, we've eliminated drift without compromising spurious response ratio, Signal-to-Noise Ratio sensitivity or other important specifications.

There more features make the Sansui system still easier to use. One, you need not remove your hand from the knob to make sure the station is surely quartz-locked. Two, locking range is wide, even rough tuning locks in the desired station and keeps it locked for hours. Three, should you turn off the tuner a built-in Re-Lock system memorizes your station for instant recall when you switch it on again.

Sansui has received patents on our Quartz/Digital-Lock System. And to ensure long-term reliability of its operation we've packaged it all in a single LSI with circuits equivalent to thousands of discrete transistors, resistors and diodes.

 

Specifications

FM Section

Tuning Range:  88 to 108 MHz

50 dB Quieting Sensitivity

Mono :  12,5 dBf

Stereo :  34,0 dBf

Sensitivity

Mono :  9,0 dBf (IHF), 0,95 µV (DIN)

Stereo :  15 dBf

Signal-to-Noise Ratio

Mono :  83 dB at 80 dBf (82 dB at 65 dBf)

Stereo :  80 dB at 80 dBf (76 dB at 65 dBf)

Frequency Response

Mono :  30 to 15,000 Hz +0,2 dB -0,5 dB

Stereo :  30 to 15,000 Hz +0,2 dB -0,5 dB

Total Harmonic Distortion

Mono :  less than 0,06% at 100 Hz (0,04% at 1,000 Hz)

Stereo : less than 0,09% at 100 Hz (0,06% at 1,000 Hz)

Captire Ratio:  0,9 dB

Adjacent Channel Selectivity

Wide :  5 dB at 200 kHz

Narrow :  18 dB at 200 kHz

Alternate Channel Selectivity

Wide :  50 dB at 400 kHz

Narrow ;  80 dB at 400 kHz

Spurious Response Ratio:  110 dB at 98 MHz

Image Response Ratio:  110 dB at 98 MHz

RF Intermodulation:  75 dB at 08 MHz

AM Suppression Ratio:  60 dB at 98 MHz

Stereo Separation

40 dB at 100 Hz

50 dB at 1,000 Hz

35 dB at 10,000 Hz

30 dB from 30 to 15,000 Hz

Antenna Input Impedance

Balanced :  300 Ω 

Unbalanced ;  75 Ω

Output Voltage/Impedance

Variable :  1 V/2,5 k Ω

Dolby FM :  200 mV/9 k Ω

AM Section

Tuning Range:  530 to 1600 kHz

Sensitivity: 47 dB/m at 1,000 kHz (220 µV/m)

Selectivity:  35 dB at 1,000 kHz

Signal-to-Noise Ratio :  50 dB

T.H.D.  Less than 0,35% at 30% Mod. 80 dB/m

Image Response Ratio:  70 dB at 1,000 kHz

IF Response Ratio:  70 dB at 1,000 kHz

General

AC Outlets:  Unswitched, total 100 watts

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

Power Consumption:  22 watts

Semiconductors:  73 Transistors; 57 Diodes; 6 FETs; 16 ICs

Dimensions (W x H x D):  430 x 168 x 402 mm (16-15/16" x 6-5/8" x 16-1/2")

Weight: 9,6 kg (21,2 lbs)