Quick answer

Choose a QED Performance headphone extension by matching the plug size to your headphones (3.5mm for most portable gear, 6.35mm for studio or hi-fi cans) and the length to your listening distance. The 1.5m and 3m options cover desk and couch use; the 5m suits larger rooms.

Why plug size matters first

The 3.5mm jack is standard on smartphones, laptops, portable DACs, and most consumer headphones. The 6.35mm (1/4 inch) plug is common on studio headphones, hi-fi amplifiers, and professional audio gear. If your headphones have a 3.5mm plug but you need to connect to a 6.35mm amp, you will need an adapter or a cable with the correct termination.

QED offers dedicated extensions for each size, so you do not have to rely on adapters that can add bulk or signal degradation. The 6.35mm version (QE7305) is built for users who already have a 6.35mm connection and want to maintain a pure signal path.

Length trade-offs: 1.5m, 3m, and 5m

Shorter cables (1.5m) keep signal loss minimal and are easier to manage on a desk or when using a portable DAC. The 3m length gives you freedom to move around a small room without excessive slack. The 5m cable is best for home listening setups where your amplifier or source is across the room.

Longer cables can introduce more capacitance and resistance, which may very slightly affect high-frequency response over extreme distances, but for runs up to 5m with quality oxygen-free copper conductors, the difference is negligible for most listeners.

QED Performance series build quality

All QED Performance extension cables use oxygen-free copper conductors, which reduce oxidation and maintain consistent conductivity over time. The construction is designed to preserve audio fidelity even over longer runs, making them a step above generic extension cables.

If you are using high-impedance or planar magnetic headphones, the extra attention to conductor quality can help maintain detail and dynamics. For casual earbuds, a standard cable may suffice, but the QED build adds durability and better shielding against interference.

How to choose your QED headphone extension

  • Step 1: Match the plug size: Check your headphone plug. If it is 3.5mm, pick a QE7300 (1.5m), QE7301 (3m), or QE7302 (5m). If it is 6.35mm, pick the QE7305 (1.5m). Do not buy an adapter unless you already own one. Using the correct plug size avoids signal loss and keeps the connection secure.
  • Step 2: Choose the length: Measure the distance from your headphone jack to your source. Add 30 cm for slack. 1.5m works for desk use, 3m for a couch or bedside, 5m for across the room. Longer is not better if you do not need it. Shorter cables are easier to manage and reduce clutter.
  • Step 3: Consider your audio gear: If you own high-impedance headphones or a dedicated headphone amp, the oxygen-free copper construction helps preserve signal integrity. For low-impedance earbuds or casual listening, the difference is subtle but the build quality still adds durability. Invest in the Performance series if you value long-term reliability and audio fidelity.

Product facts

Who should buy which QED cable

Best for

  • Home listeners with a dedicated headphone amp and 6.35mm output who need a 1.5m extension (QE7305)
  • Portable users with 3.5mm headphones who want a tidy desk setup (QE7300, 1.5m)
  • Anyone needing a 3m or 5m extension for a larger listening space (QE7301 or QE7302)

Not for

  • Users who need a 3.5mm to 6.35mm adapter – these are pure extension cables, not converters
  • Budget-focused buyers who only need a short, temporary extension – a generic cable may suffice