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)

 

Pioneer SE-L15 headphones

Lightweight Stereo Headphones

The latest ideas in headphone technology are incorporated into our top-of-the-line SE-L15 Lite-Phones. Pioneer's exclusive "Variable Chamber" design, provides rich, full-bodies bass response. A corrosion-free gold-plated plug reduces contact resistance for less signal loss. For your convenience, the SE-L15 is provided with two interchangeable cords, one for portable cassette players and one for home hi-fi systems,. In addition, a muting switch on the cord socket lets you listen to outside sound without removing the headphones.

 

Cross-section Diagram of Variable Chamber Design

1. Air control path
2. Damping diagram
3. Damping mesh
4. 4 Back air port
5. 5 Tangential-edge dome diaphragm

 

Specifications

Impedance:  50 Ω

Sensitivity:  101 dB/mW (1 kHz)

Max. Input Power:  100 mW (each channel)

Frequency Range:  10 - 22,000 Hz

Connection Cords:  3 m with gold-plated standard plug, 1,5 m with gold-plated mini plug

Weight:  75 g (2,7 oz) without connection cord

 

SIgnet TK33 headphones

Electret Condenser Stereophones

The time has finally arrived when stereophones can assume their rightful importance as essential elements in critical high fidelity systems. And the same standards of excellence normally applied to other prime components can now be applied to these transducer.

Whether you inted your stereo phones for critical monitoring of live recordings, private listening where loudspeakers might intrude, binaural broadcasts and recordings, or simply to enjoy them for their own virtues as superb reproducers, their quality should not compromise the rest of your music system.

While the bulk of stereo listening has traditionally employed loudspeakers, stereophones now offer the potential for performance that can actually exceed that of loudspeakers in every essential respect. Stereophones have an advantage, of course, since they need not move a roomful of air, not overcome awkward acoustic conditions. By providing linear response at the ears, with full dynamic range, stereophones can be the reproducer of choice to fully enjoy the subtle delights of a well-engineered direct-to-disc recording. And recent experiments in binaural sound are predicted on stereophone listening exclusively.

While others may consider stereophones as an accessory, at Signet, we prefer to thing of them as an alternative listening technique. Just as viable as loudspeakers, and with advantages of their own. And until you experience Signet stereophone listening, you may not be aware of the clarity, transparency, response, and freedom from distortion that can be achieved. These advantages stem from two essential attributes of the Signet concept; advanced knowledge of transducer design, and uncompromising standards of performance.

 

Specifications

Type:  Dipolar Electret Condenser Headphones

Frequency Response:  10 - 22,500 Hz ±2 dB, 20-20,000 Hz

Sensitivity (1 kHz, 0 dB = 0,0002 µBar):  100 dB at 1 V

Total Harmonic Distortion:  01% (at 110 dB SPL)

Matching Impedance:  4 - 16 Ω

Ear pads:  Porous Vinyl

Cord:  2,5 m (8,2 ft) with special plug

Weight

Without Cord :  210 grams (7,4 oz)

With Cord :  275 grams (9,7 oz)

Diaphragm:  2 microns thick, high-compliance film

Voice Coil:  40 micron Silver-copper self-supporting

Impedance Matching Adapter

Dimensions (H x W x D):  140 x 60 x 220 mm (5,5" x 2,4" x 8,7")

Adapter Weight:  1620 grams (4 lbs)

Adapter Cable:  1,2 m (3,9 ft) 4 conductor

 

Signet TK22 headphones

Moving Coil Dynamic Sterophones

Like other Signet products, Signet Stereophones are created in our electroacoustic laboratory. Assembly is painstaking, quantities are limited, testing is rigorous. And the standards reflect the highest technology available. There are but two Signet models; a moving coil dynamic and an electret condenser. Both benefit from the resources of one of the largest transducer manufacturers in the world. Yet each is also the product of a small group of skilled and dedicated specialists, the Signet Group.

 

Specifications

Type:  Moving Coil Dynamic Headphones

Frequency Response; 20 - 20,,, Hz

Sensitivity (1 kHz, 0 dB = 0,0002 µBar):  96 dB at 1 mW

Total Harmonic Distortion:  0,4% (at 110 dB SPL)

Matching Impedance:  4 - 16 Ω

Ear pads:  Fabric-covered Foam

Cord:  3,5 m (11-1/2 ft) with 1/4" stereo phone plug

Weight

Without Cord :  205 grams (7,2 oz)

With Cord :  260 grams (9,2 oz)

Diaphragm:  20 microns thick, Polyester dome

Voice Coil:  40 micron Silver-copper self-supporting

 

JVC HA-SU7 headphones

Headphones for Surround Processor

 

Specifications

Type: Moving coil

Unit Diameter:  30 mm (front); 23 mm (rear)

Nominal Impedance:  40 Ω  (front); 32 Ω  (rear)

Sensitivity:  100 dB/1 mW (front)

Frequency Response:  20 - 18,000 Hz (front)

Max. Input Capability:  100 mW (front)

Cord Length:  5 m (16,4 ft) with 3,5 mm Stereo miniplug

Weight:  170 g (6,1 oz) without cord; 280 g (10,2 oz) with cord

Accessories:  6,3 mm dia. Plug adapter (converts stereo miniplug to stereo phone plug)  x 2

Toshiba HR-10M headphones

Dynamic type headphones

Frequency Response:  20 - 20,0000 Hz

Sensitivity:  97 dB 1W/1m

Weight:  50 g (1,8 oz) 

Infinity ES-1 headphones

The most acurate headphones ever created. That was the goal.

When Infinity's scientists set out to develop such a stereo component, we determined to start from the highest achievement to date in headphone reproduction - electrostatics - and to remove the previous limitations of electrostatics.

The ES-1 Headphone System demonstrates that accomplishment. And no longer are the finest headphones any less accurate than the finest speakers.

An altogether new diaphragm material is employed in these headphones because it follows dynamic changes much faster and more precisely than the polyester others use. This extremely low-mass material, called Polyurethin, is so responsive as to provide a transient fullness impossible to achieve in the past.

 as a result, Infinity's electrostatic headphones deliver a frequency response of 20 to 25,000 Hz ±2 dB; at a sound pressure level of 100 dB; they show total harmonic distortion of less than 0,3%; their maximum output is a full 118 dB SPL; the realism of their reproduction is startling.

The ES-1 Headphone System consists of one headphone set and the walnut-enclosed adaptor containing power supply and matching transformers. Front-panel output connectors accommodate two headsets; an optional second set is available from your Infinity dealer.

The power supply is to be connected between your amplifier and speakers. Front panel switchingwill let you leave your headphones connected whether you are listening to them or to your speakers. Power supply is also provided with a fast-acting protection circuit to switch off either channel or both in case of overloading that might otherwise damage the unit. A re-set button on the front panel easily puts the circuit back into operation.

Infinity Electrostatic Headphones operate in the push-pull mode, that is, the power amplifier's signal is boosted by the transformer, and constant bias (DC) voltage sets up electrostatic fields which push and pull the diaphragm between two grids.

Infinity coats the Polyurethin of the diaphragms precisely evenly with conductive chemical compounds. The material and the process deliver three benefits:

A high "ratio of extension", the ability to respond to the smallest signal variations and return instantaneously to original tension. Infinity has achieved a marked improvement over polyester, which is 20 times heavier than Polyurethin.

Reduction virtually to zero of the distortion that can be caused when energy is reflected at the suspended edge of a headphone diaphragm.

Voltage spread evenly over the entire diaphragm surface so it will move as a perfect piston with no "hot spots" moving sooner or more than other portions.

As with every Infinity product, the purpose and the result of our using the most advanced technology is to deliver the original, uncolored sound of music exactly as recorded. In the case of the ES-1, you experience a spacious, open quality. Not only can you hear sounds around you (baby's cry, doorbell), but in addition, the music seems to be spread naturally all around you, and not focused unnaturally inside your head.

Your private listening experience with Infinity Electrostatic Headphones will be gratifyingly comfortable, supremely accurate, and totally musical.

Specifications

Frequency Response:  20 Hz to 25,000 Hz ±2 dB

Total Harmonic Distortion:  less than 0,3% at 100 dB SPL

Sensitivity:  98 dB SPL at input of 2 volts at 1000 Hz

Maximum Output:  118 dB SPL

Maximum Input:  50 watts at 100 Hz

Source Impedance:  4 to 16 Ω

External Power Requirements:  117 or 220 volts AC 50/60 cycles, ,01 watts

Headphone Weight:  9 ounces

Headband Adjustment:  11-1/2 to 13-1/2 inches

Headphone Cord Length:  98 inches

Adaptor Size (W x H x D):  5-1/4" x 3" x 7-1/4"

Adaptor Input Cord:  33-1/2 inches

Adaptor AC Cord:  67 inches

Sennheiser HD40 headphones

Here's more proof that no one combines extraordinary sound and extraordinary comfort quite like Sennheiser HD40 headphones, weighing in at an incredible two ounces, are the lightest-weight standard series Sennheiser Open-Aire headphones ever.  Yet, despite their unusual compactness, they continue the Sennheiser tradition of superb clarity and definition over a wide frequency range. plus rugged reliability, for years of musical enjoyment.

The Sennheiser HD40 offers an additional advantage, a new standard of value, out performing headphones many times its price. and the stranded-steel cable sets a new standard for durability.

For use with your portable walkaround you can get the same kind of superb sound and easygoing comfort with the Sennheiser HD40W.

Audition them today. You'll hear - and feel - the difference.

Specifciations:

HD40

Frequency Response:  22 Hz to 18 kHz

Impedance:  600 Ω (may be used with 4 ohm to 600 ohm outputs)

Sensitivity Nominal :  90 dB (SPL 1 m / at 1 kHz)

Total Harmonic Distortion:  1,5% (at 94 dB SPL)

Weight:  2,0 ounces (without cable)

Cable:  10 foot stranded-steel with molded standard 1/4" stereo phone plug

 HD40W

Impedance:  42 Ω

Sensitivity:  94 dB at 1 mW/1 kHz
Cable:  4 foot stranded-steel with stereo phone mini plug

Sennheiser MS100 headphones

Inside-Out Headphones

Introducing Inside-Out™ MS100 hedaphones from Sennheiser.

If you thought you couldn't get the kind of lifelike musical reproduction from your portable that you get from the finest home equipment, prepare to think differently.

Most people who know audio know that Sennheiser's Open-Aire® design deliveres sound that clearly surpasses even the most expensive home loudspeakers. It's unequalled in wide linear response, in transient ability, in ultra lghtweight comfort.

Now comes the breakthrough.

For the first time you can have headphones rugged and reliable enough to bring you that same performance not only at home, but outdoors as well. All thanks to the advanced electroacoustic technology that made Sennheiser a legend among recording studio technicians, astronauts, and audiophiles alike.

An exclusive new design in headphones that are compatible both with fine home stereo equipment and portable walkarounds, complete with 6-foot "Inside" extension cable, exclusive Sennheiser Open-Air® technology is comfortable, lightweight,, yet permits total listening environment indoors or out.

Specifciations:

Frequency Response:  20 Hz to 20 kHz

Impedance:  42 Ω

Sensitivity Nominal SPL at 1 kHz:  96 dB

Total Harmonic Distortion:  1%

Weight:  1,4 ounces

Accessories:

Outside 4-foot cable with standard mini stereo plug

Inside 6-foot extension cable with standard stereo phone plug

2 extra Open-Air headphone cushions

Sennheiser HD-430 headphones

With HD-430 Sennheiser offers "new generation" headphones featuring improved magnet and sound-surround diaphragm design. Said to be "virtually distortion free", the headphones weighing only seven ounces provide audio frequency response from  16 to 20,000 Hz. Hearmonic distortion is put at less than 0,5% (DIN 45 500). This performance is achieved by use of a new diaphragm design and of a more powerful magnet weighing one-third as much as those made of conventional materials. Model HD-430 is also the first Sennheiser headphone to combine an open air design with circumaural ear cushions which lightly surround the outer ear to separate the ear from direct contact with the inner foam pad and yet permit all the advantages of openxerts a handband pressure of only about three Newtons which is an index of listener comfort. Typically. Open air headphones have half the headband pressure of conventional closed headphones, says Sennheiser. Impedance is 600 ohms per channel, and sensitivity (nominal spl at 1 kHz) is 94 dB at 1 mW input. HD-430 is provided with a 10-foot stranded-steel cable with stereo phone plug.

Performance

A very comfortable pair of headphones with very light pressure on head and ears. Suspension headband is somewhat difficult to adjust for optimum fit. Sound quality is slightly bright. Definition is exceptional. Efficiency is much higher than average, and headphones can be driven to high sound levels with relatively little power. Extremaly clean sound.

Specifications

Frequency Range:  16 Hz - 20 kHz

Impedance:  600 Ω /channel

Nominal Sensitvity SPl (at 1 kHz):  94 dB (1 mW input)

Harmonic Distortion:  less than 0,5%

Weight:  7 ounces

Cable:  10 foot cable and stereo phone plug

Beyer-Dynamic DT440 headphones

Earphones are made for ears.

That's why the Beyer DT440 has sound so natural and is so light and comfortable you don't even know it's there, even after many hours.

At 9,6 ounces, it is one of the lightest headphones available. Andits weight is evenly distributed among the sponge-padded ear-cups and air-filled headband.

There's no great weight suspended from your head, and your ears never get squeezed.

Some people complain about the isolation of headphones that close them off from the world. So we built the DT440 with a high velocity open design, to allow a natural mixture of recorded music and environmental sound.

How does it sound? Most people say "spectacular". A great combination of impact and intimacy. The overall sound is wonderfully smooth and transparent. With clean, rich bass response. Powerful, lifelike midrange. Crystal-clear, undistorted highs. And perfect stereo imaging.

For sound - and for comfort - nothing beats a Beyer. We'd like to make one for you.

Audio-Technica ATH7 headphones

Whether the requirement is for critical monitoring of professional recording sessions or finest quality home reproduction, the ATH-7 will meet your most stringent standards for quality. Listening reveals the excellence of the ATH-7 . The precise electret elements respond uniformly to the entire audible range.. Superb transient response results from a moving diaphragm just 5 microns (or 0,0002") thick. The bipolar construction eliminates old-fashioned, bulky ear cups, and the light touch of the ATH-7 spells comfort even for an estended session of concentrated listening. The soft suede-finish headband distributes the light 7-1/2 oz. weight so that it is hardly noticed.

The handsome impedance-matching adapter connect easily between the amplifier or receiver and your speakers with a switch to select either speaker or stereophone listening. A green LED indicator flashes on normal program, while a red LED signals high-level peaks and warns of possible overloads. Specially engineered cables and connectors insure the utmost reliability.

For the ultimate in personal listening, the ATH-7 with its smooth, uncolored, wide-range response is a worthy addition to the very finest high fidelity systems.

Specifications:

Type:  Electret Condenser, Monopolar

Sensitivity (at 1 kHz, 0 dB - 0,0002 Bar):  98 ±1db

Harmonic Distortion (at 110 dB SPL):  0,3%

Frequency Range:  10 - 25,000 Hz

Matching Impedance:  4 - 32 ohms

Max. Input Power (at 500 Hz/minute):  5 watts

Diaphragm:  FEP 5 M film. 45 High compliance, low mass

Cord:  2,5 meter lenghth with 4-pole special plug

Weight:  275 grams with cord (210 g without cord)

Ear Cushions;  porous vinyl leather

Color:  Mat finished. Brown and Black

Yamaha HP-3 headphones

Yamaha invites you to enjoy a private word of musical enjoyment. Light, and with the gentlest of ear-pad pressures, the HP-3 headphones are a transparent window on the world of music.

Wide frequency response and low distortion combine to give a clear and uncolored reproduction superior to the finest loudspeakers. And you can enjoy the full, shattering sound levels of hard rock, or grand opera, without disturbing those around you. They also assure faithful and delicate reproduction of a whispered vocal, or a solo violin. Orthodynamic design is the secret.

With the HP-3 you may well forget that you are wearimg headphones. But you will never forget the thrilling realism that they bring to your private musical enjoyment.

Specifications;

Type:  Orthodynamic Type

Impedance:  150 Ω

Diaphragm Diameter:  46 mm

Sensitivity:  93 dB/mW, 101 dB/V

Max. Continuous Input:  1 W

Max. Input: 3 W

Weight: 210 g (with cord)

I like

Pioneer SE-L20

Light, extremely compact open-air type stereo headphones featuring high molecular film diaphragm.

Can a set of stereo headphones weighing a more 205 grams (less than eight ounces) provide the same natural feeling you experience when listening to a conventional stereo speaker system? Pioneer says the answer is yes - and proves it with the introduction of the SE-l20 headphones. These light, highly compact headphones feature a Pioneer innovation - specially designed high molecular film diaphragm which is used in the 1½-inch dynamic speakers. The sound is natural, the response in the treble range is especially excellent, the bass response is rich and powerful. And thanks to a whole new brand of headphone technology, you'll enjoy long hours of fatigue free listening with the SE-L20. in fact, you'll hardly know you're wearing them.

Improved Open-Air Design

The design of the SE-L20 headphones is completely new . The back of each headphone unit is open so that the ear is not completely enclosed as with conventional type headphones. The result of this design is an extraordinary wide dispersion of sound, rare for headphones and not unlike the same natural feeling of listening to an ordinary speaker system.

Specifications:

Matching Impedance: 4 to 16 Ω

Maximum Input Power:  0,5 V

Frequency Range:  20 to 20,000 Hz

Sensitivity:  97 dB/0,1V

Driver Unit:   38 mm (1½") dynamic speaker

Weight:  205 g (7,2 oz) without connecting cable

Connecting Cable:  2,5 m (8,2 feet)

Sansui SS-2

 Stereo headphone

Complete engineering on both electronic and human levels brings a new kind of sound purity and comfort to the stereo enthusiast in the form of Sansui's Stereo Headphone set, Model SS-2.

Electronically, the SS-2 utilizes specially developed cone-paper with very high radiation characteristics to overcome a problem that has plagued stereo manufactures for years - faithful reproduction in the low-frequency ranges.  The moving coil type SS-2 shows excellent transient stability throughout the entire range of 20-18,000 Hz, with exeptional impedance and L/R balance characteristics as well as high damping factor.

Outstanding Bass Reproduction 

The cultivation of a very high-radiation cone-paper enables low-frequency reproduction all the way down to 20 Hz, a figure almost beyond the reproduction capability of a 12-inch woofer. Distortion is less than 1% at 1 mW input. 

Flat Characteristics 

The high-moving coil with its excellent transient stability, and special cone-paper with its superior vibration characteristics (70 mm in diameter) combine to completely cover the wide range of frequencies from 20 Hz to 18,000 Hz. The impedance characteristic is also excellent, allowing powerful sound reproduction with a high damping factor. 

 Right and Left Channel Balance 

The output sound pressure level is rated at lower than 1 dB for perfectly balanced stereo reproduction from both Right and Left channels. Unlike listening via speaker systems, headphone listening assures an optimum stereo effect, since Right and Left channel sounds never have the chance the interfere with each other in the air. 

Ear Pads Designed for Comfort 

The ear pad for model SS-2 are made of softly finished Vinyl-Chloride, leather-like in appearance. They have been doubly finished so that ambient heat never becomes a comfort-impairing factor. They can be worn over an extended period of time in complete comfort. 

Functional and Attractive 

The head band is completely adjustable for individual head and ear positioning.

The SS-2 is available in black and white two-tone design. 

Caution 

The SS-2 is a highly-sensitive headphone set. Its sound output is extremely high even at an input as low as one-thousandth of a watt. If the amplifier power is beyond the Maximu Rated Power Input, there is a possibility of damage. Therefore, in connecting this set directly to higher-powered amplifier the volume of the amplifier should always be reduced. 

Specifications 

Type:  Dynamic type 

Impedance:  8 ohms 

Frequency Response:  20 - 18,000 Hz 

Distortion:  less than 1% at 1 mW input 

Input Power:  1 mW 

Max.rated Power Input:  500 mW 

Diameter of Cone Paper:  70 mm 

Weight of Cone Paper:  450 mg 

Diameter of Voice Coil:  132 mm 

Length of Cord: 1,8 m (6") 

Weight (net):  360 g (12,6 oz)   

AKG K 340

 K-340

The K-340 headphone surpasses even the most elaborate electrostatics in transparency and accuracy. It has deeper and more precisely defined bass than is available from the most  expensive loudspeakers, while also being completely free from the effects of room acoustics. Every detail of the sound is clear and natural, and the acoustic image is better localized than with any other headphone available. Listening fatigue is the biggest enemy of headphones - but you can listen to thecoloration-free K-340's hour after enjoyable hour.

 A headphone's acoustical performance is academic if it is uncomfortable to wear, so every unnecessary ounce of weight was eliminated. The K-340 - despite its dual transducers and crossover networks - weighs about the same as an average open air headphone. Side pressure against the head is very low, and the large ultra-soft urethanefilled circumaural earpads may be removed for cleaning. The headphones are supported by a wide, soft headband with raised pads which not only permit air to circulate, but also provide flexibility to conform to the exact curvature of any head. Strength is supplied by a dual-bow bail above the headband. The bail terminates in a pair of self-adjusting slide fittings that automatically position the earpieces at the proper height.

 The K-340 comes with a 3 meter coiled input cable that terminates in a standard ¼" stereo phone plug. The cable's flat, side-by-side conductors are specially designed to reduce kinking. The input cable is brought directly to the left earpiece, and the headphone bail carries audio to the other earpiece, doing away with distracting "Y" cords under the chin. No detail has been overlooked in the design and every detail is revealed in the music for your enjoyment.

Specifiactions

Transducer Types:  Dynamic moving coil low-frequency system; Fixed-charge electrostat high-frequency system.

Frequency Range:  16 Hz to 25,000 Hz

Crossover:  4000 Hz , 6 dB/octave

Nominal Impedance:  400 Ω, each channel

Sensitivity:  1,6 Pa/volt

Nominal Listening Level Requirements:  0,63 V (1 mW) for 94 dB SPL (approx. 1 Pa)

"IHF Sensitivity"  rating 5,0 V (63 mW) for 112 dB SPL (approx. 8 Pa)

Sound Pressure level for less than or equal to 1,0 THD:  104 dB (200 to 2,000 Hz)

Maximum Continuous Input (per channel):  9 V (200 mW) approx. 117 dB SPL

Cable:  3 meter (9,8 feet) 4 conductor cable with 3-conductor ¼" phone plug.

Weight:  385 grams (13,5 oz ) less cable

Contact Force:  Approx. 3 newtons (10,5 oz)

Sony MDR-CD7

 Building full-size equipment capable of properly reproducing Sony's new media is difficult enough. Add the constraints inherent in headphone design, and you'll understand the design challenge of the MDR-CD7 headphones. To be effective with the ES Series' digital-quality sound sources, they had to combine wide, linear response, deep bass output, and full dynamic range. On top of all that, they had to be lightweight and comfortable to wear.

Only the Size and Weight are Small.

The solution?  An innovative transducer design. The MDR-CD7 uses a small but very strong Samarium Cobalt magnet for startlingly wide frequency-response. And a high compliance 24K gold ion plated diaphragm exhibits extraordinary amplitude, resulting in an impressive dynamic range of 135 dB.

For comfort, the slightly off-center mounting position of the urethane earpads guarantees proper side pressure distribution and good balance for all wearers. The pads themselves are specially designed to conform to the ear, further increasing comfort, providing 30 dB of isolation from ambient sound and extending bass response.

Paying Careful Attention to Detail

The cord is made of nearly pure copper. More copper means less oxygen content - since oxygen interferes with the transmission of the sound-carrying electrons, that means the MDR-CD7's wire provides clear, open sound.

With a conventional system, all this careful construction and expensive material might seem like overkill. But with Sony's new digital-quality media, even little things make a big difference.

That's why the MDR-CD7 headphones sound so sensational.

Specifications

Headphone Type:  Closed, dynamic

Driver Type:  30 mm diameter; Dome driver (24K gold ion plated)

Sensitivity:  110 dB SPL at 1mW

Frequency Response:  2 Hz - 24,000 Hz

Impedance:  45 Ω

Rated Power:  10 mW

Power Handling Capacity:  50 mW

Cord:  3 m (30 feet) OFC Litz wire

Plug:  Sony Uni-Match design with both stereo miniplug and ¼" phone plug

Weight (without cord):  80 grams (3 ounces)