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The Oyaide P-3.5 Series is a lineup of high-precision 3.5mm stereo mini plugs designed from the ground up for audiophile-grade and professional audio applications. Built with top-tier materials and exacting tolerances, these plugs deliver superior conductivity, mechanical stability, and long-lasting durability — making them ideal for custom interconnects, headphone cables, and high-resolution portable audio gear.
The Oyaide P-3.5 Series is a lineup of high-precision 3.5mm stereo mini plugs designed from the ground up for audiophile-grade and professional audio applications. Built with top-tier materials and exacting tolerances, these plugs deliver superior conductivity, mechanical stability, and long-lasting durability — making them ideal for custom interconnects, headphone cables, and high-resolution portable audio gear.
Appearances of Digital music players expanded the field of listening to music unlimitedly. Due to their convenience and portability, not only general users but also audiophiles regard them as the music player of the new generation.
And then, various related accessories such as portable amp and monitors such as headphones and desktop speakers are released for better sound quality.
Changing a headphone cable is of course one of the very important factors for improvement sound quality.
At the same time we produced HPC series headphone cable, we developed the hi-quality 3.5mm stereo mini plug, P-3.5 series” for D.I.Yers who love to customize their special accessories.
Please enjoy crafting your own cables with P-3.5 series which are produced by the accuracy of “Made in Japan”.
“P-3.5 Series” 3.5 stereo plugs are designed to give a unique identity to the HPC series and QAC-202 3.5MLS. The metal part is made of brass that complies with the European RoHS Directive. The center pin, which is the key to signal transmission, is plated with thick-wall gold for P-3.5G/P-3.5GL, and 1.5μ-thick silver for P-3.5SR/P-3.5SRL, and further plated with 0.3μ-thick rhodium.
This prevents corrosion of the contacts and contributes to improved transmission characteristics. Oyaide’s craftsmanship is also reflected in the outer shell, which is carefully machined one by one by NC machining, knurled precisely, and finished with a beryllium plating, just like a camera lens.
The internal structure is also designed for high sound quality with high rigidity and materials that minimize transmission degradation.
Creating quality. This attitude is the theme that will continue through the years at Oyaide Electric. The essence of Japanese craftsmanship resides in the meticulous and careful finishing of every detail.
P-3.5G/P-3.5GL are characterized by their mellow resonance, sense of sound field, and low-frequency volume; the P-3.5SR/P-3.5SRL have a sharp, clear sound image and outstanding low-frequency tightness; the straight type and L-type are designed for ease of use; and the four variations will further expand the fun of your own cable production. The four variations will further expand your enjoyment of self-made cables.
Pure phosphor bronze conductors ensure high conductivity and elasticity
Plated with gold, silver, or rhodium/silver, depending on model
Each finish offers distinct sonic characteristics:
Gold: Smooth, rich, warmer sound
Silver/Rhodium: Crisp, fast, high-definition sound
Eliminates potential magnetic field interference near analog signal paths
Perfect for use with sensitive low-level signals (e.g., line-out, DAC output)
Solid and protective outer casing resists EMI and ensures longevity
Compact form factor for snug fit in portable devices or tight desktop setups
Tailored for easy soldering with cable sizes commonly used in high-end portable audio
Anti-fatigue design reduces strain on wire terminations
Custom 3.5mm headphone or interconnect cable builds
Portable DACs, amps, smartphones, and DAPs
3.5mm-to-RCA, 3.5mm-to-XLR, or balanced TRRS adapter projects
Replacing inferior stock plugs in high-end IEM cables
Improved transient response, clarity, and spatial separation
Less microphonic interference and signal loss vs standard plugs
High mechanical integrity ensures consistent signal flow over time
Use Oyaide SS-47 solder or similar audio-grade silver solder for optimal results
Pair with Oyaide 102 SSC wire for a fully synergized DIY interconnect or headphone cable
If using with balanced 2.5mm/4.4mm systems, Oyaide also offers other plug types for full upgrade paths
Model Name | P3.5 series |
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Plug | 3 pole 3.5mm Mini |
model | Straight:P-3.5G/P-3.5SR Angled:P-3.5GL/P-3.5SRL |
Material | P-3.5G/P-3.5GL: brass (24k gold plating) P-3.5SR/P-3.5SRL: brass (silver + rhodium plating) |
Outer shell | Brass + Chrome plating |
Minimum diameter of outer shell | 8.0mm |
Maximum diameter of outer shell | 8.3mm |
Connection Method | soldering |
Handling Max cable O.D. | 6.0mm |
Release Date | 2009/06/10 |
Model | 3.5mm TRS plug (silver/rhodium plating), 3.5mm TRS R/A plug (silver/rhodium plating), 3.5mm TRS plug (gold plating), 3.5mm TRS R/A plug (gold plating), 2.5mm TRRS plug (gold plating) |
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