Gold-Plated 3.5mm Stereo Audio Plug – DIY Solder Connector for Headphone, Microphone & AUX Cable Repair

Gold-plated 3.5mm TRS (Tip-Ring-Sleeve) stereo audio plugs for DIY cable fabrication and headphone/AUX cable repair. The 3.5mm TRS plug is the universal standard for stereo headphone and portable audio connections — used on smartphones, tablets, laptops, portable music players, and audio interfaces. Gold plating on the contact surfaces prevents oxidation, maintaining low contact resistance and reliable signal transfer over years of use. Solder-type termination provides the lowest resistance connection for DIY cable builds.

Key Specifications

• Plug Size: 3.5mm (1/8-inch)
• Type: TRS (Tip-Ring-Sleeve, 3-pole stereo)
• Contact Material: Brass, gold-plated
• Body Material: Zinc alloy or brass
• Termination: Solder type
• Cable Entry: Accepts cable OD 3–5mm (verify before ordering)
• Impedance: Suitable for 16–600Ω headphone loads

TRS vs TS vs TRRS — 3.5mm Plug Types

• TS (Tip-Sleeve, 2-pole, mono): Tip = signal, Sleeve = ground. For mono connections: guitar to amplifier, mono speaker connections. No ring segment.
• TRS (Tip-Ring-Sleeve, 3-pole, this product): Tip = Left channel, Ring = Right channel, Sleeve = Ground. For stereo headphones, balanced mono connections (Tip = hot, Ring = cold, Sleeve = GND), and insert send/return on mixing consoles.
• TRRS (Tip-Ring-Ring-Sleeve, 4-pole): Adds a microphone channel to the TRS configuration. For smartphone headsets with integrated microphone. Two wiring standards exist: CTIA (Apple/Android standard: Tip = Left, Ring 1 = Right, Ring 2 = GND, Sleeve = Mic) and OMTP (older standard, GND and Mic swapped). Verify the standard before wiring.

Frequently Asked Questions

How do I solder a 3.5mm TRS plug?

1. Slide the plug body and strain relief over the cable before soldering — they cannot be added after. 2. Strip the cable jacket 20–25mm. Separate the conductors: typically red = right channel, white or green = left channel, bare copper braid = ground. 3. Tin each conductor with solder. 4. Solder: Left channel to Tip terminal, Right channel to Ring terminal, Ground/shield to Sleeve terminal. 5. Use a fine-tip iron at 350°C — apply heat to the terminal, not the solder. 6. Slide the strain relief forward and tighten. 7. Test with a multimeter: verify continuity from each conductor to its terminal, and verify no shorts between Tip, Ring, and Sleeve.

How do I identify which terminal is Tip, Ring, and Sleeve on a 3.5mm plug?

Looking at the plug from the tip end: the Tip terminal is the small solder cup at the very end of the plug body. The Ring terminal is the middle solder cup. The Sleeve terminal is the large solder cup at the rear (closest to the cable entry). On most 3.5mm solder-type plugs, the terminals are labeled T, R, S or are color-coded. If unlabeled, use a multimeter in continuity mode to verify which terminal connects to which contact on the plug tip.

What cable should I use for headphone repair?

Use 3-conductor shielded audio cable (28–26AWG per conductor). For headphone cables, thin and flexible cable is preferred — look for cables with a total OD of 3–4mm. Mogami W2893, Canare L-4E5C (4-conductor, use 3), and generic 3-conductor shielded cable are all suitable. Verify the cable OD fits within the plug’s strain relief before cutting — a cable that is too thick will not fit through the strain relief.

Can I use a 3.5mm TRS plug for a balanced connection?

Yes. 3.5mm TRS is used for balanced mono connections on some audio interfaces and portable recorders: Tip = hot (+), Ring = cold (-), Sleeve = GND. This is the same physical plug as a stereo headphone connector — the difference is in how it is wired and what equipment it connects to. Do not connect a balanced TRS output to an unbalanced stereo input without a proper adapter — the cold signal on the Ring will be shorted to ground by the unbalanced input, potentially damaging the output stage.

Typical Applications

• Headphone repair: Replacing broken 3.5mm plugs on headphones and earphones
• AUX cable fabrication: Building custom-length AUX cables for car audio and home audio
• Microphone cables: Lavalier and condenser microphone cable repair and fabrication
• Audio interfaces: Custom patch cables for studio equipment
• DIY audio: Custom interconnect cables for portable audio equipment

Package Contents

Gold-plated 3.5mm TRS stereo audio plugs (quantity as selected). Strain relief included.