Oyaide J-3.5SR 3.5mm stereo mini female plug w/ silver + rhodium plating

Basic

When using headphones or earphones, the supplied cable is not long enough to reach the headphone amplifier, and an extension cable for headphones is sometimes required. However, there are no high quality extension cables available, and the use of extension cables has traditionally been accompanied by a deterioration in sound quality in exchange for the use of extension cables, or by restrictions on the listening position. Even when making your own extension cables, you were forced to compromise on sound quality due to the lack of quality female plugs on the market.

In response, Oyaide Electric has developed a new 3.5 stereo mini female plug, “J-3.5SR”.

J-3.5SR is a 3.5mm stereo mini jack terminal that thoroughly pursues sound quality. It consists of a machined copper alloy housing, a copper alloy electrode with a silver/rhodium double-layer plating, and a molded glass filler mixed resin with excellent heat resistance and rigidity. The extremely thinly machined copper alloy cover is plated with hard beryllium chrome to reduce weight and damp vibration, while providing a high-grade finish.

“J-3.5SR” is a must-have item for self-produced extension cables. The completed extension cable “HPC-35J/62J” with “J-3.5SR” is also available at the same time.

Features

3.5mm 3 pole Mini Female Plug for Pursuing Higher Sound Quality

“J-3.5SR” is a 3.5 stereo mini jack terminal that, like Oyaide’s series of plugs, is thoroughly designed for sound quality.

The housing is made of machined copper alloy, and the electrodes are made of copper alloy plated with two layers of silver/rhodium plating, molded with a glass filler mixed resin that excels in heat resistance and rigidity. The extremely thinly machined copper alloy cover is plated with hard beryllium chrome to reduce weight and damp vibration, while providing a high-grade finish.

💎 Key Features

✅ Silver + Rhodium Plating

• Silver offers the highest conductivity of any metal

• Rhodium adds corrosion resistance, hardness, and a clean, crisp tonal edge

• Combined, they produce high-definition, extended treble and fast transients

✅ Precision Construction

• Tight tolerances for solid plug engagement — no wobble or signal dropout

• Low contact resistance ensures minimal signal loss even over time

✅ Brass Housing with Shielding

• Reduces EMI/RFI from nearby circuits or wireless devices

• Machined for secure mounting in enclosures or custom audio builds

🎧 Sound Signature

• Highly resolving, fast, and neutral

• Enhances detail, air, and transient response

• Excellent for lossless audio and high-resolution DACs or DAPs

🧠 Ideal Use Cases

• DIY or upgrade of:

  • Portable DAC/amp enclosures (e.g., Chord Mojo mods)

  • High-end headphone amps

  • Desktop audio interfaces

  • Custom headphone splitters and adapters

• High-performance 3.5mm-to-RCA or 3.5mm-to-XLR interconnect builds

🛠️ Pro Tips:

• Pair with Oyaide’s silver-based solder (e.g., SS-47) for perfect signal transfer.

• Mount in shielded enclosures for minimal noise.

• Ideal cable match: 102 SSC wire or 5N silver interconnect cable.