Qed Reference XT40i Speaker Jumper Cable


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SKU: 121072 Category:

Qed Reference XT40i Speaker Jumper Cable 4 x 20cm  (Set for two Stereo Speakers). 

2 Pairs of SPEAKERS JUMPER Cables Terminated of one end 4x high quality 24 Gold-plated AIRLOC Banana plugs, other end 4x high quality 24 Gold-plated Spade connectors.The cables are Pressure crimped of professional crimping tool QED AIRLOC HIGH PERFORMANCE TERMINATION.

The ends finished with qualitative colour coded black & red heat shrink and the additional transparent sleevs which gives better stiffening of cable and a great visual effect.


AIRLOC a solder-free, airtight perfect fusion between the two metals of cable and plug. This ‘cold weld’ method allows the cable and plug to offer the optimum signal transfer and therefore, better sound quality. It also reduces contact resistance and ensures perfect long-term performance.


So what do I do with these jumper cables?

Well, almost all speakers come with standard grade copper jumpers (bare rails). For a quick and effective upgrade to your bi-wirable speakers simply remove the standard connectors bare rails and affix ours for instant Qed.


*100% High quality*

*Fully tested* 

*Guarantee of quality*

*We send all item/s within 1-2 days*



The What Hi-Fi? Five Star award winning XT-40i cable.


Hi Dear Watchers.I wanted to add a few words from me.

Repeatedly tested my products and reaching for feedback from my clients and I’m certain that the results are better than with the original links and that bi-wiring there is unnecessary and expensive.  All in all, my customers rate this as a very good value up-grade.



Znalezione obrazy dla zapytania qed airloc diagram



We offer the matching Qed XT-40i Speaker Cables in custom length.

Please Visit Our Shop or please feel free to contact with us.



 XT40i with X-Tube™ Technology

As befits a company rapidly closing in on its fifth decades at the forefront of speaker cable design, QED’s brand new XT40i speaker cable builds on the formidable reputation of the XT40 cable it replaces and offers a decisive step up in sound quality.

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 XT40i’s already potent audio capability. The result is a cable that advances on the class-leading standards set by its predecessor.

We urge you to audition XT40i – we’re confident you’ll agree it even outperforms alternative cables at many times the price. Prepare to be surprised and delighted.

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 Oxygen Free Copper AirGap

Large Cross-Sectional Area

The 4mm2 cross sectional area means XT40i 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.

QED X-Tube Signal Diagram


• Length: Custom
• Wire Gauge: 12 AWG
• 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
Cable Geometry
About QED Cables:
QED is an award winning British company with over 40 years of experience in the audio-visual connectivity industry.
In 1973 Bob Abraham and Ian Vine founded QED Audio Products and changed the way people think about hi-fi cables. By the time QED 79 strand speaker cable was launched in 1978, it wasn’t looked upon as ‘just another speaker cable’ but was instead regarded as a serious hi-fi component, making a fundamental change in the way people thought about cables.
QED’s reputation for innovation and technical excellence is known throughout the world. The latest computer-aided design techniques allow their research and development team to keep pace with technological advances and deliver products that achieve the highest levels of performance and reliability. This is why QED products are recommended by so many of the world’s leading hi-fi and home theatre equipment manufacturers.
QED offer a range of connectivity products spanning from both consumer and installation cables, wireless products and switching devices to satisfy every audio visual need.
QED is Europe’s number one award winning connectivity brand and has won more prestigious cable awards from ‘What Hi-Fi? Sound & Vision’ magazine than any other brand (Awards 1981–2013)
Also Available:

• Termination speaker cables with NEW QED SUPERIOR AIRLOC METAL FORTE High Performance 4mm Spring-Loaded Banana Plugs.

• The QED Bi-Wire Link (Speaker Jumpers Cables)

• The QED Analogue Interconnects

• The QED other Speaker Cables

Please Visit Our Shop.


If you would like a different combination of spade to spade connectors, or banana to banana plugs, or different  jumpers  lengths, please free to contact with us.

Please have a look at our other items, Any questions please contact us.Thanks for looking.

Additional information

Weight 0.1 kg
Connector A

Banana Plugs

Connector(s) B

Spade Connectors


Speaker Cable (Jumpers)



Cable Length


Manufacturer warranty

1 year



Country/Region of Manufacture

United Kingdom


12 AWG




• Length: Custom
• Wire Gauge: 12 AWG
• 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


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