QED XT40i Speaker Cable

The multi-award-winning QED XT40i Speaker Cable delivers superior performance.

This pure oxygen-free copper cable uses an evolution of QED’s established X-Tube technology to guarantee superb timing and stereo imaging and adds the brand new and highly innovative Air Gap dielectric to bring unheard-of rhythmic accuracy and musicality to a cable of this modest price.

Very low DC resistance adds unrivalled frequency response to QED XT40i’s already potent audio capability. The result is a cable that advances on the class-leading standards set by its predecessor.

Air Gap Dielectric

By increasing the separation of the conductors inside the cable, and therefore the amount of air between them, QED has created a low-loss Air Gap dielectric.

This technology halves the dissipation and capacitance characteristics of the cable, and results in numerous audible improvements – particularly where timing and rhythmic accuracy are concerned. Despite this increased separation, though, XT40i retains the sort of cross-sectional area that makes it ideal for long cable runs.

X-Tube Technology

At low frequencies both X-Tube and conventional stranded/solid core speaker cables convey signals in a linear way. However, at high frequencies, X-Tube retains a near-linear signal transfer, whereas the conventional cable fails to conduct uniformly across the entire conductor area. The result is that XT40i cable X-Tube delivers greater fidelity across the audio spectrum which would otherwise be lost in ordinary cables.

Technical Specifications

• Outside diameter: 6 x 14 mm
• Conductor area: 4 mm²
• Dielectric properties: Air Gap (εr = 2.4)
• Conductor chemistry: 99.999% oxygen-free copper
• Dielectric properties: Air Gap
• Loop resistance: 8.0 mΩ/m
• Parallel capacitance: 35 pF/m
• Dissipation factor @ 10kHz: 0.0295
• Self-inductance: 0.57 μH/m
• Gauge: 12 AWG
• Stranded Diameter: 2.75 mm (min)
• Suitable for ABS, Metal & Maxi Airloc