Headphone Adaptor Cables Explained: Match Connectors to Amp and Headphones

Quick answer

To match a headphone adaptor cable, first identify the connector on your headphones and the output on your amplifier, then choose a cable that bridges them without adapters if possible. For ABYSS Diana and JOAL headphones, JPS Labs cables are made specifically for those models, so start there. If your amp offers balanced outputs, use a balanced cable only when both the amp and headphones support it.

Matching a headphone adaptor cable is less about brand matching and more about connector geometry, wiring, and power handling. Get one of those wrong and you will hear hum, channel imbalance, or nothing at all.

This guide walks through a practical sequence: identify your headphone connector, identify your amplifier output, choose the right cable type, and verify the fit before you buy. It also explains where ABYSS and JPS Labs cables fit in, and when a simpler solution is better.

Identify your headphone connector first

Start at the headphone end. Connectors vary by model: some use a single 3.5 mm or 6.35 mm plug, others use dual 3.5 mm, dual 3-pin XLR, or a proprietary molded connector. ABYSS Diana and JOAL headphones use a custom molded connector that fits flush inside the cup, so a generic cable will not seat properly.

Check the product page or the connector itself before shopping. If your headphones use a molded or recessed connector, you need a cable designed for that model. The JPS Labs Diana Headphone Cable is made specifically for Diana and JOAL, with gold-plated molded plugs that fit perfectly. That is the safest starting point.

• Common mistake: assuming all 3.5 mm plugs are the same depth. Recessed sockets need slim or molded plugs.

Identify your amplifier output

Next, look at your amplifier. Outputs are usually single-ended (6.35 mm or 3.5 mm) or balanced (4-pin XLR, dual 3-pin XLR, or 4.4 mm). Balanced outputs separate left and right grounds, which can improve channel separation and lower noise on a fully balanced amp like the Woo Audio WA22 (2nd gen).

Do not assume your amp is balanced just because it has an XLR jack. Some amps offer XLR for convenience only. Check the manual or the product description. If the amp is single-ended, a balanced cable will not make it balanced. You need both ends to support the same wiring scheme.

• Checkpoint: if the amp has a 4-pin XLR output, it is likely balanced. If it has a 6.35 mm output, it is likely single-ended.

Choose the cable that bridges both ends

Once you know both connectors, pick a cable with the correct headphone-side plug and amplifier-side plug. For ABYSS Diana and JOAL, the Superconductor HP upgrade cables are made in the USA with custom configurations and lengths, and offer a choice of dual 3-pin XLR, 4-pin XLR, 4.4 mm balanced, or 1/4-inch plug at the amp end.

If you are upgrading from a stock cable, the Diana Headphone Cable is also a customizable upgrade over the stock JOAL cable, providing a higher level of resolution particularly when combined with leather or hybrid ear pad upgrades. That makes it a practical first step before moving to the Superconductor line.

• Common mistake: buying a cable with the right amp plug but the wrong headphone plug. Always verify both ends.

Decide between balanced and single-ended

Balanced wiring can improve channel separation, soundstage, and imaging on a fully balanced amplifier. The Woo Audio WA22 (2nd gen) is an all-tube, fully balanced headphone amplifier and preamplifier, so it benefits from a balanced cable. The Woo Audio WA33 (2nd generation) ABYSS Edition is also fully balanced and is considered by ABYSS to be the finest tube headphone amplifier to mate with their headphones.

But balanced is not automatically better. If your amplifier is single-ended, or if your headphones are wired single-ended internally, a balanced cable may not work without a converter. Use balanced only when both the amp and the cable are designed for it.

• Checkpoint: if you hear only one channel or a weak signal, you may have a wiring mismatch. Stop and verify before turning up the volume.

Verify fit and length before you buy

Length matters more than most people expect. A cable that is too short pulls on the headphone; too long and it coils on the floor. Measure from your listening position to the amp and add a little slack. JPS Labs cables offer multiple lengths, so you can match your room.

Also check the amplifier-side connector depth. Some XLR jacks are recessed, and some 6.35 mm jacks are tight. If the plug does not seat fully, you may get intermittent sound. A cable with a slim or molded plug is less likely to have this problem.

• Common mistake: ordering a 10-foot cable for a desktop setup. Three to five feet is often enough.

Step-by-step: matching your adaptor cable

1. Step 1: Identify your headphone connector: Look at the plug on your current cable or the socket on your headphones. Note whether it is 3.5 mm, 6.35 mm, dual 3.5 mm, dual 3-pin XLR, or a molded connector like the one on ABYSS Diana and JOAL. Checkpoint: if the connector is recessed or molded, a generic cable may not fit. Choose a model-specific cable.
2. Step 2: Identify your amplifier output: Check the amp's front panel or manual. List every output: 6.35 mm, 3.5 mm, 4-pin XLR, dual 3-pin XLR, or 4.4 mm. Mark which are balanced and which are single-ended. Checkpoint: do not assume an XLR jack is balanced unless the manual says so.
3. Step 3: Choose balanced or single-ended: Use balanced only if both the amp and the cable support it. On a fully balanced amp like the Woo Audio WA22 (2nd gen) or WA33 ABYSS Edition, balanced wiring can improve channel separation and imaging. Checkpoint: if the amp is single-ended, a balanced cable will not make it balanced. Match the amp's actual design.
4. Step 4: Pick the cable with the right plugs on both ends: For ABYSS Diana and JOAL, the Superconductor HP upgrade cables offer a choice of dual 3-pin XLR, 4-pin XLR, 4.4 mm balanced, or 1/4-inch plug at the amp. The Diana Headphone Cable is the direct stock replacement and JOAL upgrade. Checkpoint: verify both the headphone-side and amp-side connectors before ordering.
5. Step 5: Confirm length and fit: Measure the distance from your listening position to the amp and add slack. Check that the amp-side plug will seat fully in a recessed jack. JPS Labs cables offer multiple lengths to match your setup. Checkpoint: a cable that is too short pulls on the headphones; too long and it becomes a trip hazard.
6. Step 6: Test at low volume before critical listening: Connect everything, turn the amp down, and play a familiar track. Listen for channel imbalance, hum, or intermittent sound. If something is wrong, power down and recheck the connectors. Checkpoint: if one channel is missing, you likely have a wiring mismatch. Do not turn up the volume to compensate.

Product facts that matter for adaptor cables

• Diana Headphone Cable for Diana Stock Replacement and JOAL Upgrades: Made specifically by JPS Labs for the ABYSS Diana headphone, with high quality gold plated molded plugs that fit Diana and JOAL perfectly. Also a customizable upgrade over the stock JOAL headphone cable, providing a higher level of resolution particularly when combined with leather or hybrid ear pad upgrades. This is the direct-fit option for Diana and JOAL, so you avoid adapter fit issues. It also gives you a clear upgrade path if you later add ear pad upgrades.
• Superconductor HP upgrade cables for ABYSS Diana and JOAL Headphones: Made in the USA exclusively for the ABYSS Diana and JOAL headphones. Ultra high quality upgrade with custom configurations and lengths. High copper content gold plated connectors for natural clarity. Custom molded end connectors fit inside and flush fit Diana and JOAL perfectly. Choose dual 3 pin XLR, 4 pin XLR, 4.4 mm balanced, or 1/4" / 6.35 mm plug at amp. This cable covers the main amplifier output types, so you can match a balanced or single-ended amp without a separate adapter. The flush-fit molded connectors reduce strain on the headphone socket.
• Woo Audio WA22 (2nd gen) Fully-balanced Headphone Amplifier / Preamplifier: All-tube design, fully balanced headphone amplifier and preamplifier. The advantage of a fully balanced system is improved channel separation, more precise soundstage, and imaging. If you own this amp, a balanced cable will let you use its full balanced topology. Using a single-ended cable here leaves balanced performance unused.
• New! Woo Audio WA33 (2nd generation) Fully-balanced Headphone Amplifier ABYSS Edition: Fully-balanced headphone amplifier. We consider the WA33 ABYSS Edition (2nd Gen) to be finest tube headphone amplifier money can buy to mate with... This is a reference-level balanced amp, so it deserves a cable that matches its balanced outputs. A single-ended adapter would limit its potential.

Matching a headphone adaptor cable comes down to three things: the headphone connector, the amplifier output, and whether the system is balanced. For ABYSS Diana and JOAL, JPS Labs cables are built to fit those headphones directly, so you can skip the adapter guessing game. Start with the connector you have, choose the cable that matches, and verify the fit before you listen.