QED Reference XT40 Speaker Cable

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QED Reference XT40 Speaker Cable
Warranty Period: Limited Lifetime (Domestic) Sold as: per meter


Acclaimed by What HI-FI? Magazine; this 'Five Star' award winning pure copper loudspeaker cable boasts QED's advanced X-TubeTM technology and a massive 4mm2 cross sectional area. This results in a cable that delivers clear sonic advantages over conventional cable designs by maintaining a flat frequency response within the audio band.

We are so confident about the performance of the new XT40, we urge enthusiasts to audition and compare it, not only to their favourite cable but also to alternative models at any price.

Prepare to be surprised!


Please let us know in the comments section on checkout how you want this cable to be terminated or if you want plugs fitted (purchased seperately).




At low frequencies both X-TubeTM and conventional stranded/solid core speaker cables convey signals in a linear way. However, at high frequencies, X-TubeTM retains a near-linear signal transfer, whereas the conventional cable fails to conduct uniformly across the entire conductor area. The result is that X-TubeTM delivers greater detail and fidelity across the audio spectrum which would other wise be lost in ordinary cables.


LARGE cross-sectional area

The 4mm2 cross sectional area means XT40 exhibits very low resistance, allowing amplifiers to exert outstanding control over the speakers they are driving. In addition, its large cross sectional area makes it suitable for long cable runs.



Wire gauge - 12 AWG

Jacket OD - 6.00mm
Cross-sectional area - 4.00mm²
Loop resistance - 0.008 Ω/m
Capacitance - 59pF/m
Inductance - 0.46 µH/m
Dissipation factor - 0.0576
Nominal outside diameter 6.0 mm

For best results use QED Airloc™ Forte banana plugs.

QED Lifetime Guarantee