Dynavector Systems
Low Output Moving Coil Cartridge with diamond cantilever

KARAT 17DX

Flux Damper(patent)

Softened Magnetism (patent)

Design Concept
MC cartridge KARAT series is the world's first diamond cantilever model that continues from 1981. KARAT series is designed using 'dispersion
theory' based on Vibration Engineering. The cantilever length is also very short, 1.7 mm, so 17DX can not be produced without long experience andadvanced craftsmanship. Theoretically, 17DX with micro vibration system plays high frequency to near 100 kHz. The width and flatness of theplayback frequency band outperform the latest digital media and any other cartridges.
In order to improve this historic cartridge, we tried many prototypes and studies in accordance with the excellent regeneration environment of moderntimes. As a result, we improved the reaction speed of the sound and the sound resolution.
So long as a company exists as an audio manufacturer, the perfect reproduction of the enormous heritage of music recorded on black discs is still
one of the very important obligations. We are performing this difficult duty by KARAT 17DX.

New Brass Body
KARAT 17DX is developed while paying attention to main body material. As a resultof many trial production, we decide to use a machined brass. It make the excellent
frequency characteristics of the KARAT series further leap forward, high frequency
range is improved without harshness. Furthermore, by changing the conventional
neodymium magnet to a samarium-cobalt magnet with low magnetic resistance, wecan realize a clear sound field reproduction with fast sound rise and high resolution.

Magnetic Circuit
KARAT 17DX is installing the flux damper and softened magnetism. By an additionof these two improvements, harshness or irritating edginess that is more or lesscommon to MC cartridges has been eliminated.

Specifications● Type : moving coil with flux damper and softened magnetism ● output voltage : 0.3mV (at 1 KHz, 5cm/sec) ● frequency response : 20 - 20,000Hz● channel balance : 1dB (1 KHz) ● channel separation : 25dB (1 KHz) ● compliance : 15 mm/N ● impedance : 32 ohms ● stylus : small size MicroRidge Line contact ● cantilever : 1.7mm length solid diamond ● Tracking force : 1.8 - 2.0 grms ● recommended load impedance : >100 ohms
● weight : 11.0 grms

※Specifications is subject to change without notice.

Dynavector Systems
Technical Note of Dynavector MC Cartridges
Flux Damper
We focused on the magnetic interference that occurs between the movement of the amateur within theair gap of the magnetic circuit and the magnetic yoke surrounding it. So we discovered that the flux
fluctuation caused a big influence to the reproduced sound.
Dynavector MC cartridge has a flux damper (patent) on the front yoke to eliminate this flux fluctuation.
Because of this technology, magnetic flux fluctuation has drastically decreased compared with conventional MC cartridge. So no smooth and colored over the entire band has achieved a natural reproduced
sound.

Softened Magnetism
In recent MC cartridges, high-energy rare-earth magnets such as samarium-cobalt magnets and neodymium magnets are used to increase theoutput voltage. However, adopting such a magnet is effective for improving the output of the MC cartridge, but the magnetic field in the air gap of thecartridge is easily affected because the magnetoresistance is extremely high. As a result, intermodulation or harshness becomes noticeable when
reproducing the track of large amplitude sound.
In the Dynavector MC cartridge, this internal magnetic resistance is reduced by a unique method. So the stabilization of the magnetic flux within theair gap is remarkably improved compared with the conventional MC cartridge.

Dispersion Theory
In order to convert the mechanical vibration from the record into the electric vibration, the input wave as the bending wave needs to propagate to theoutput side without distortion.
When this bending wave propagates through the cantilever, it has been known that the speed of the bending wave changes depending on thewavelength or frequency. This phenomenon is called dispersion.
A signal composed of various frequency components like a music signal is regarded as a series of wave packets. The speed of the propagating wave
packet depends on the frequency, and it will break its shape when propagating through the cantilever. Therefore, in order to faithfully reproduce themusic signal recorded, it is necessary to improve the dispersion characteristics as much as possible.
The theory of dispersion on the cantilever vibration is unduly overlooked in the design of the high performance cartridges. These cartridges have
marvelous frequency response in similarity but sound individually. This paradox can be analyzed only by the dispersion theory. Dynavector is the firstand still only one company designing cartridges by both theory of dispersion and frequency response.
Since the debut of KARAT DIAMOND, we recognized the truth of the dispersion theory. And by the rapid advancement of the laser technology inthese years, the more precise cutting and forming became possible. This condition made it easier and possible to produce the shorter diamondcantilever.

Fig.A

Fig.B

Fig.C

Reference Input

Conventinal TypeKARAT 17DX

The effect of dispersion is shown by (A) is the input square waveform comprising harmonic frequency component up to 200th higher harmoniccomponent. (B) shows the wave deformation by the dispersion in 7mm length conventional cantilever. (C) shows the effect of dispersion in 1.7mm
cantilever of KARAT17DX. By shorter cantilever the smaller dispersion effect is recognized by these diagrams.
In summary, when sound is transmitted through a solid in the dispersion theory, the speed of transmission differs between high frequency and lowfrequency. As a result, the waveform is disturbed. For accurate transmission, use a shorter cantilever and a material with faster transmission speed.

※Specifications is subject to change without notice.

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