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

 

Audio Technica AT30E cartridge

AT30E Stereo Phono Cartridge with Vector-Aligned Dual Moving MicroCoils and user-replaceable Stylus.

A top-quality moving coil cartridge exhibits remarkable sonic clarity and transparency. This performance can be attributed to the very low mass, and low inductance of the tiny coils used to sense the stylus motion. But until now, moving coil cartridge popularity has been limited by three major problems which seemed almost inherent to moving coil designs.

1)It seemed impossible to make a user-replaceable stylus assembly without compromising performance.

2)Most moving coil cartridges exhibited relatively low tracking ability due to rather stiff cantilever mounting system.

3)Outputof the cartridge was below the level needed for commonly available amplifier inputs.

Introducing the new Audio technica AT30E and the end to all three problems. Our design approach is simple and direct. Rather than localethe coils in the cartridge body, they are integral with the stylus assembly. If the stylus becomes worn or damaged, the entire moving system, coils and all, is simply unplugged and replaced, just like a moving magnet cartridge. Large, gold-plated connectors insure loss-free connections so vital at the low voltages generated by a good moving coil cartridge. The result is easy field replacement with no penalty in terms of performance.

Careful research indicated that good tracking and moving coil design were indeed compatible. By controlling, effective mass and utilizing a radial damping system similar to our famed Dual Magnet cartridge, we have achieved excellent tracking ability throught the audio range. Compliance is individually controlled during manufacture of each assembly to optimize performance. This extra step, impossible with most other designs, coupled with our unique radial damping ring, insures excellent tracking of the high-energy modulation found in many of the top-quality recording now available.

Each coil is located in the ideal geometric relationship to reproduce "its" side of the record groove. This Vector_Aligned design assures excellent stereo separation, minimum moving mass, and the highest possible efficiency. It's design concept which is exclusive to Audio-Technica, and is a major contributor to the outstanding performance of the AT30E.

The AT30E output is similar to many other fine moving coil cartridges. But an increasing number of amplifiers and receivers are featuring built-in "pre-preamplifiers" or "head amplifier" to accommodate moving coil cartridges directly. Thus the new systems buyer can make a cartridge choice based on sonic characteristics rather than on input compatibility. In addition, Audio-Technica offers the Model AT630 Transformer for matching to conventional amplifier inputs.

The new Audio-Technica AT30E Dual Moving Micro-Coil Stereo Phono Cartridge.

Specifications

Generating Element:  Dual Moving MicroCoil

Frequency Response:  15 - 25,000 Hz

Output:  0,28 mV ( at 5 cm/sec)

Channel Separation:  25/15 dB (1 kHz/10 kHz)

Channel Balance:  0,75 dB

Stylus Shape:  3 x 7 ellipticall

Stylus Construction:  Nude

Tracking Force:  1,4 - 2,0 grams

Vertical Tracking Angle:  20° (IEC/DIN standard)

Recommended Load Impedance:  20 Ω

Terminals:  ,050" diameter

Mouting:  1/2" centers

Dimensions:  5/8" x 1-9/64" x 11/16"

Weight:  5,0 grams

Replacement Stylus:  ATN30E

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