Miyajima Labs Stereo Cartridges
The patented cross-ring method eliminates several cartridge design flaws. The cross-ring method makes several improvements. The ability to generate a low distortion signal is drastically improved by putting the centerpoint of the suspension, the fulcrum, at the center of the coil armature (instead of being behind the coil). By replacing the traditional tie-back wire technique with the Miyajima fulcrum, the dynamic behavior of the stylus/cantilever is made more linear. By replacing the iron coil armature (former) with resin, the coil armature does not interact with the magnetic field. Further, the Miyajima cross-ring generator features a new way of winding the coil armature to minimize distortion and cross-talk. There are two significant problems in a conventional moving coil cartridge: 1) The conventional MC cartridge installs a square iron core to a cantilever and winds up a coil to the iron core. And it installs a tie-back wire in the center of the iron core. And it is fixed through a rubber damper in the Yoke. Therefore the pivot point is located in a rubber damper behind the signal generating coil. There is the cross-shaped thing to the iron core, too, with a winding geometry that is less than perfect. This traditional method is the magnetic induction AC electricity generating system, which requires a magnetic armature, usually of iron. Because of manufacturing techniques, this iron armature is separated from the pivot point or axis of rotation. 2. In addition, the pivot point is very vague because a tie-back wire is the bending point. Much like comparing a proper hinge to a tree limb. The vague fulcrum cannot precisely and consistently follow the groove, as increasing forces will pull the coil further out of the ideal magnetic gap, leading to distortion. This old style of suspension is unpredictable, and is also more reactive, the same way a tree limb whips around in high wind. An additional benefit of using resin cores, versus iron is that the iron core suffers from Hysteresis distortion. That subject is complicated to explain, but it is the “memory” of a magnetic material. There is a constant lag in the change of magnetism, causing distortion. Resin does not suffer from magnetic Hysteresis. So iron interacts with the magnetic flux, it is heavy, and it suffers from Hysteresis distortion The cross ring method was devised.
The cross ring method eliminates several problems with conventional MC cartridges. The cross ring method focuses the dynamic behavior of the coil, keeping the left and right channels synchronized and in the uniform magnetic field by giving the cross-ring cartridge a defined rotational center-point. In addition, a resin core was chosen over an iron core because the pivot point is inside the magnetic core. The resin core frees the core from magnetic interaction with the powerful magnets being used, freeing the coil to move naturally.
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This method, the Miyajima cross ring method, is patented and is a significant improvement in the evolution of phono cartridges. It took seven years to finish the cross ring development period, and many efforts were necessary to realize the final product. I made the main body of wood to maintain a natural sound. It avoids the artificial sounds of metal and plastic. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| A figure of structure of the conventional stereo cartridge | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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A figure of structure of the cartridge of the cross ring method | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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All stereo cartridges of Miyajima-Lab are Cross Ring methods | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
If you like true sounds, the cross ring method will become the best product.
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