5N pure silver, shielded twin-axis cable for both analog transmission and 110Ω digital transmission.


At Oyaide Electric, there is a principle of cable creation based on a firm design philosophy. We do not tolerate the word "compromise" at all. Always challenging ourselves to pursue superior performance, Oyaide Electric has created products with innovative ideas and novel concepts that have never been seen before. In 2005, we attempted a limited production of the FTVS-408 coaxial cable using pure silver, which has the highest conductivity of any metal.

This trial was initially a test case within the framework of limited production, but the response was so strong that we decided to make it a regular product. This initial test sales project, which culminated in a cable project using a rare metal, pure silver, was the first step in setting the direction for the future of Oyaide Elec cable production. Three months later, the concept was further evolved and refined into FTVS-510.

FTVS-510 established the category of 5N pure silver coaxial by further refining and purifying the silver refining process and redesigning the insulator, shielding, and everything else.

In 2008, FTVS-910 with a twin-axis layout was finally released. The highly polished fine wire technology has further evolved over the past three years. With its high utility, resolute presence, and outstanding performance, it will captivate anyone in an instant.

Silver coated mesh with brilliant shine." FTVS-910" is a statement of boundless transparency. Design is an extension of function, and its unparalleled beauty is inevitable." The most distinctive feature of the FTVS-910 is the 5N pure silver used in the center conductor. This high-grade silver wire undergoes continuous casting in a high-frequency electric furnace under advanced production control, 19 processes of cold rolling, annealing twice, drawing with a natural diamond die, and skin-pass treatment, to ensure not only purity but also crystalline structure. This results in a conductor that is free from stress distortion and is aligned and crystallized.

PFA, which has the lowest dielectric constant among insulators, is used as the insulator of FTVS-910. The filling layer is also characterized by Oyaide's originality. The filling layer is made of foamed PE, which has a low dielectric constant, and contributes greatly to the improvement of the transmission characteristics of "FTVS-910". Furthermore, the shielding inherits the two-layer hybrid shielding that has already proven its high shielding performance in the preceding FTVS-510. It protects wide-band noise, and also shields against weak spark noise.
The FTVS-910 has been built theoretically and constructively in every respect.

The cable impedance is set at 110 ohms. This means that the FTVS-910 can be used not only for analog transmission, but also for digital signals (AES/EBU) transmission.


1.0mm 5N Pure Silver Solid Conductor

The best material selected for high speed transmission, Pure silver.

FTVS-910 uses 5N pure silver as its center conductor, which has the highest conductivity of any metal (Silver 61e6 , Copper 58e6 σ[S/m]). The conductivity of pure silver is a rare metal with far superior electrical characteristics than high-purity copper. FTVS-910" has a premium material at its core, with a price difference of more than 70 times (as in July 2008).

The refining and wire refining methods also show the skill of a master craftsman and a deep knowledge of quality. Jewelry-grade sterling silver, which is distinctly different from industrial-grade silver, is processed from the ingot state." FTVS-910" melts 5N virgin material already in ingot form in a ceramic crucible. The crucible is replaced after each shot and is always fresh. All of these processes are carried out in a high-frequency electric furnace, and inert gas is sealed inside the furnace during the melting process to prevent impurities from mixing with oxygen.

After melting, the pure silver is formed into round bars with a diameter of 15 mm, which are then cold rolled into wire through a 19-step process. After that, the wire is finally refined, and here, too, the skills of our craftsmen are put to full use. To avoid rapid downsizing, the wire is drawn several times at low speed using a natural diamond die. The silver wire, which has been aligned to approximately 1.05 mm, undergoes a skin pass process to shave and smooth the surface of the conductor to create a mirror finish on the conductor surface. However, the process does not end here.

Annealing is performed twice to relieve the stress in the crystal caused by the drawing process. In a low-temperature electric furnace maintained at a constant temperature, the stress strain generated in the cable is slowly alleviated over time. During this process, the inside of the furnace is filled with inert gas to prevent the binding of oxygen, resulting in high-purity pure silver wire that contains absolutely no impurities. The finished silver wire is then immediately packaged with nitrogen gas and carefully stored until the process of attaching the insulation.

Wire Insulations

The conductor is the most important element in transmitting signals. However, the insulator is also an important element in enhancing the transmission characteristics of the cable." FTVS-910" uses PFA (fluoropolymer), which has the lowest dielectric constant among existing resin insulators, to reduce signal loss due to insulation.

The filling layer also shows Oyaide's knowledge of cables.
Foam PE (polyethylene), which contains air by foaming, is mounted in the filling layer. This prevents the dielectric constant from rising due to the filling layer and also enhances the flexibility of the cable.

Furthermore, this layout of different materials not only improves electrical characteristics, but also quickly attenuates internally generated vibrations by changing the resonance point.

Carbon PE Semiconductor Layer

PFA is an insulator with excellent electrical properties, but at the same time it is the most static-charged resin. When a signal flows through the cable, weak vibrations are generated, and the static-charged material is subjected to corona discharge due to these vibrations.

" FTVS-910" solves this problem by mounting a carbon PE semiconductor layer around the perimeter of the filling layer. This allows the charge charged on the PFA to be released through the semiconductor layer.

Triple Layer Hybrid shielding

The pursuit of unlimited transparency." The quietness of the FTVS-910 is the result of a shield design that adapts to the increasingly complex system environment and to noise in all frequency bands.

The first layer of semiconductors suppresses electrostatic noise and provides high shielding performance against electromagnetic waves.

The second layer, the copper foil shield, provides 100% shielding and is effective against high-frequency noise.

The third layer, silver plated mesh shield, is set at 90% shielding.

The mesh shield is effective against noise in the low-frequency band, but by silver-plating the strands, it also exhibits high shielding performance in the high-frequency band. This is the result of utilizing the skin effect effect of the signal.

Cable Outer Sheath

The transparent polyurethane sheath mounted on the outer contour not only enhances the beauty of the FTVS-910. The polyurethane outer sheath is mechanically strong and maintains a constant hardness without softening or hardening due to temperature changes.

In addition, polyurethane material has excellent shock absorption and a high modulus of elasticity, contributing greatly to isolation from external vibrations. Design is an extension of function, and its unparalleled beauty is the result of necessity.


Model Name FTVS-910
Conductor Material 5N (99.9995%) Pure Silver
Conductor Size 1.0mm Solid Wire
Insulator Material PFA / Foamed Polyethylene (2nd.)
Shield Carbon PE / Copper foil + Silver plated copper mesh
Outer Jacket Material UV Coated Polyurethane
Impedance 110 Ω
Capacitance 72.1nF/Km
Attenuation 74.5 dB/Km
Conductor Resistance 25 Ω/Km
Cable Diameter (Nominal) 8.5mm
Put-up type Reel(50m)
Release Date 2008/8/20