Oyaide HPSC-35J / 63J The new “102 SSC” precision conductor headphone Extension Cable

Basic

100% Pure Silk Filament” is used in the inclusions that fill the gap between the signal line and the shield, and in the braided jacket that covers the cable surface, taking advantage of its static neutralizing properties.
This effectively suppresses the generation of static electricity in the cable. Noise caused by static electricity is greatly reduced.
The chic white and black mosaic cable colors match any headphones without any sense of discomfort. The HPSC-35J/63J can be used to extend headphone cables to match the usage scenario of headphones, or to convert a 3.5 stereo mini to a 6.3 standard plug. Two lengths, 1.3m and 2.5m, are available.

Features

The HPSC Series is a new series of headphone and portable audio cables from Oyaide Electric, introducing the precision conductors “102 SSC” and “Silk”. The precision conductor “102 SSC” is a conductor for audio cables created by Oyaide Electric and already highly acclaimed around the world.

The core of this technology is based on a type of oxygen-free copper, and includes “mechanical peeling” to physically remove 100% of impurities from the copper wire surface, a “natural diamond die” to smooth the copper wire surface to the utmost limit, two heat treatments under strict temperature control, and thorough management of wire diameter uniformity with processing precision of ±1μm or less. The HPSC Series’ clear, wide-range sound is supported by Japan’s world-class copper drawing and wire drawing processing technologies.

The signal line thickness of the 102 SSC precision conductor is a generous 0.3 scale. From delicate high frequencies to powerful low frequencies, the delicate headphone output is faithfully transmitted without stagnation. The shield is also made of the precision conductor “102 SSC” and is a spiral shield with excellent flexibility.

Precision conductor “102 SSC”

The HPSC Series is a new series that replaces the HPC Series.

The key technologies are the “102 SSC precision conductor” and “silk”. The cable conductor is made of 102 SSC, a new material that replaces PCOCC-A. The “precision conductor 102 SSC” developed by Oyaide Electric as a high-end audio cable has already received high acclaim around the world, but this is the first time it has been used in headphone cables.

The conductor is a 7/7/0.089 rope strand with excellent bending resistance, and its thickness is a generous 0.3 scale. It faithfully transmits delicate headphone output from delicate high frequencies to powerful low frequencies without stagnation.

The shield is also made of “102 SSC,” a precision conductor, and is a spiral shield with excellent flexibility.

Click here for more information on 102SSC

Pure silk filament

For the interconnections, 100% pure silk filament is used, which has low capacitance and is not charged with static electricity. When a signal flows in a cable, weak vibrations are generated, and materials that are charged with static electricity will experience corona discharges due to the vibrations. To solve this problem, silk filaments are mounted.

In addition, the cable exterior is also coated with a “100% pure silk jacket. The synergistic effect of these materials has greatly reduced noise without sacrificing flexibility. The chic white and black mosaic cable colors match any headphones without any sense of discomfort.

Original terminal connector

Specially designed plugs to give it a unique identity. The metal part is made of brass that complies with the European RoHS Directive. The contacts, which are the key to signal transmission, are plated directly with 1.5 µ-thick silver plating and then with 0.3 µ-thick rhodium plating on the surface. This prevents corrosion of the contacts and contributes to improved transmission characteristics.

Oyaide Elec. craftsmanship is also reflected in the outer shell, which is carefully machined one by one by NC machining, knurled precisely, and finished with a berychrome plating, just like a camera lens. These plugs are joined to the cables with “SS-47” audio solder.

Oyaide Elec. aesthetic sense is poured into every detail to create the finest quality. This attitude is the theme that will continue to guide Oyaide Electric for many years to come. The essence of Japanese craftsmanship resides in the meticulous and careful finishing of every detail. Specially designed plugs to give it a unique identity. The metal parts are made of brass, which is compliant with the European RoHS Directive. The contacts, which are the key to signal transmission, are plated directly with 1.5 µ-thick silver plating and then with 0.3 µ-thick rhodium plating on the surface. This prevents corrosion of the contacts and contributes to improved transmission characteristics.

Oyaide Elec. craftsmanship is also reflected in the outer shell, which is carefully machined one by one by NC machining, knurled precisely, and finished with a berychrome plating, just like a camera lens. These plugs are joined to the cables with “SS-47” audio solder.

Oyaide Elec. aesthetic sense is poured into every detail to create the finest quality. This attitude is the theme that will continue to guide Oyaide Electric for many years to come. The essence of Japanese craftsmanship resides in the meticulous and careful finishing of every detail.

Audio solder “SS-47” is used

Plugs and cables are soldered with “SS-47″, a lead-free silver solder specially designed for acoustic use. Ordinary solder has a tin purity of about 99.9% (3N) due to cost considerations.” SS-47″ is made of high-purity tin that is 99.993% (4N) or higher, eliminating impurities to the utmost limit. In addition, silver and copper are added to improve conductivity and prevent solder from being eaten away.

Furthermore, the ratio of silver in a normal alloy solder is 3 to 3.5%, but in “SS-47″ a whopping 4.7% is used without hesitation. In addition, SS-47 contains 1.7% copper, which has the second highest conductivity among metals after silver. This ratio dramatically improves the conductivity, and we succeeded in setting the eutectic point at 217 degrees Celsius. Of course, these blending ratios were not determined by numerical data and workability alone.

We believe that sound quality should be the top priority for a product to be labeled as an audio solder. SS-47” is the result of numerous listening tests of prototype models with various mixing ratios.

💎 Key Features

✅ 102 SSC (Super Stress-Free Copper)

• Oyaide’s flagship conductor with:

  • 99.996% copper purity

  • Ultra-precise surface smoothness and grain alignment

• Delivers high resolution, low distortion, and balanced tonality

✅ Natural Silk Fiber Damping

• Silk fiber is used as a dielectric and damping layer

• Minimizes mechanical vibrations and static charge

• Adds a touch of organic smoothness to the sound

✅ Dual-Layer Shielding

• Foil and braided shielding block EMI and RFI

• Ensures quiet background and clean signal transmission over extended lengths

✅ Gold-Plated Connectors

• High-quality brass connectors with gold-plated contacts

• Provide long-term durability and low contact resistance

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🎧 Sonic Signature

• Transparent and natural-sounding

• No tonal coloration or signal loss typical of generic extension cables

• Maintains detail, dynamics, and stereo imaging over longer runs

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🧠 Best Use Cases

• Extending headphone cables in:

  • Home listening setups (amp-to-listening chair)

  • Studio monitoring environments

  • Desktop DAC/amp rigs without front-panel jacks

• Perfect for use with:

  • High-end headphones (e.g., Sennheiser, Focal, Audeze)

  • Sensitive IEMs (HPSC-35J) due to low noise floor

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🛠️ Pro Tips:

• Use HPSC-35J for mobile rigs or short-distance extension of 3.5mm headphones

• Use HPSC-63J for full-size amps, studio use, or high-power headphone outputs

• Combine with Oyaide INS or MWA series to optimize the system for EMI control and vibration isolation