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Victor X-1II
JVC/Victor has established a new and dynamic relationship between the cartridge design and quality by investing the Pulse-Trian Analytical Method. The X-1 was the first product designed with new method, the X1-II is an improved version featured a wide range, clear definition and transparent tone quality. The X1-II faithfully reproduce silence, however transient, between notes and add tremendous presence to the reproduction of music. Because of the low-mass moving structure, the response is extended to 60kHz.
0.15mm Square Shibata Stylus:
Shibata stylus shape of the JVC Victor X-1II cartridge distinguishes itself by having the necessary small contact surface at the horizontal level for playback of the ultra-high frequencies found on CD-4 quadraphonic records. At the vertical level, the special shape of the stylus gives a wider contact surface than is the case with either spherical or elliptical styli. Various cartridge manufacturers have been inspired by the Shibata shape and now produce very expensive cartridges with stylus shapes that give the same advantages as the Shibata. These have names such as bi-elliptical, pramanic, quadrahedral, hyperbolic, pathemax, and Fine Line. Although CD-4 and other quadraphonic systems never really caught on with consumers, they have helped to speed up the development of stylus types that improve playback of stereo records in the form of a more precise treble reproduction, lower distortion, and less record wear.
Beryllium Cantilever:
The cantilever is made of beryllium, a metal that is far lighter and stronger than widely-used aluminium or titanium. It has greater velocity of sound propagation, and it’s flat response extends into the super high frequency range.
Density (gr/cm):
1.84 Beryllium / 2.69 Aluminum / 4.54 Titanium
Young Modulus (kg/mm): 28,000 Beryllium / 7,400 Aluminum / 11,000 Titanium
Velocity Of Sound Propagation (m/sec): 12,600 Beryllium / 6,420 Aluminum / 5,990 Titanium
One Point Suspension:
A very thin wire, mounted to the center-hold bushing, suspends the moving structure. Since this design clearly defines the fulcrum of the moving structure, intermodulation distortion is reduced.
Samarium Cobalt Magnet:
JVC Victor has used samarium cobalt for the magnet piece, a material that has low specific gravity and high energy product. Thanks to this new alloy formation, the moving structure is lightweight, and offers improving tracking ability and stable output.
Laminated Core Pole Pieces:
Pole pieces are made of laminated core permalloy. This superior construction leads to improved frequency response. Loss of information in the super high frequencies, often experienced with high-impedance MM-type cartridges, is AVOIDED!
Pulse-Train Analytical Method:
A JVC-developed method used for measuring and analyzing the hitherto unmeasurable group-delay and phase characteristics of a transducer (speaker, cartridge, etc.) with the assistance of a specially-cut record containing pulsive signals, coupled with a computer data processing system. This new analytical method is largely responsible for the exceptional tonal performance of the X1II as it has helped JVC find ways to cope with transient distortion and group delay distortion. It showed that a cartridge should be lightweight, which in turn has led to the use of a shortened cantilever made of superlight beryllium and a one point suspension in the X1II.
Specifications Victor X1II:
Type: moving magnet
Stylus: (DT-X2) 0.15mm Shibata diamond tip.
Frequency response: 10 to 60,000HzTracking Force: 1,5g (+/- 0,2g)
Dynamic Compliance (@100Hz): 12cu
Output: more 3.0mV (1kHz, 5cm/sec)
Channel balance: less than 1.0dB
Channel separation: more than 25dB
Impedance: 2.2 kOhms (1kHz)
Load: 47 to 100 kohms
Weight: 7.5g
