QED Reference Silver Anniversary XT Bi-Wire Speaker Cable - Custom Length

    Product code: 1881

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    QED's Reference Silver Anniversary XT Bi-Wire speaker cable is the "big brother" of the multi-award winning cable that continues to demonstrate QED's commitment to superior, high quality sound within an affordable loudspeaker cable. What Hi-Fi magazines "Product of the Year" for 3 years running, Silver Anniversary XT has been specifically designed as the natural replacement for the multi-award winning Silver Anniversary speaker cable. Combining the features of Silver Anniversary with the added enhancement of X-Tube™ technology to combat the skin effect and deliver stunning detail.


    The Silver Anniversary XT Bi-Wire is still a What Hi-Fi top 3 cable for "star rating" (This rating has been valid since February 2011, last checked June 2014). This loudspeaker cable features Aircore technology to offer superb transmission of your audio signal from source to speaker, while maintaining a smaller-than-normal cable thickness to provide excellent use within a typical home AV and Hi-fi system.

    QED Silver Anniversary XT Bi-Wire provides excellent tonal quality in all frequencies due to the research and development invested into the QED Aircore technology and in this bi-wire cable specifically. The Silver Plated, Oxygen Free Copper stranded conductor is braided around the colour-coded, hollow Polyethylene core so whether you decide to have this cable professionally terminated or simply want to fit your own connectors, this cable will provide excellent surface contact from conductor to the audio connector to offer superb sound quality.


    QED X-Tube Diagram

    One of the biggest problems facing speaker cables is keeping the inductance low as cable conductor size increases. This is vital to reduce cable losses and prevent inaccuracies in the signal transfer process, i.e. distortion. The normal way to do this is to use a number of individually insulated conductors within the cable construction. This method is utilised to great effect in the design of the QED Genesis Silver Spiral loudspeaker cable, however this results in a product that has a very high quality sound performance, but is expensive to manufacture and can be difficult to terminate.

    To take advantage of this design ethos, but in a more conventional format, X-Tube™ forms the conductor in the shape of a tube with an inner Aircore. This has the same effect as using multiple insulated conductors and ensures that high frequencies are transmitted cleanly, with the added benefit of ease of termination. This unique tubular conductor geometry also provides lower flux density within the conductors, which gives improved transparency to the sound.


    1.) At low frequencies both X-Tube™ and conventional stranded/solid core speaker cable convey signals in a linear way. This is represented by the uniform green colour of the strands shown in the two diagrams above.

    2.) At higher frequencies X-Tube™ retains a near-linear signal transfer, whereas the conventional stranded/solid core cable fails to efficiently conduct higher frequencies uniformly across the entire conductor area. The diagram shows excess current density at the periphery (designated in red) and rapidly deteriorating current density (green through to white) towards the centre of the conductor.

    The effect of this is to reduce the actual cross-sectional area of the cable at 15kHz to less than 75% of that at low frequencies. The result is induced distortion and a compromise in the performance of the cable.

    X-Tube™ with Aircore technology exhibits much lower self-inductance and is therefore less affected by this problem. The use of an innovative Polyethylene Aircore enables a reduction in loop inductance to levels only usually achievable by using more costly and difficult to terminate cables.

    This cable offers 4 x cores suitable for advanced bi-wire speakers and hifi requirements, and the inner cores are Red / Black / Yellow / Blue for easy identification of the different poles. If you require cable termination on this bi-wire cable, AV4Home can offer a range of termination styles to suit your requirements. The Silver Anniversary XT Bi-Wire is still a What Hi-Fi top 3 cable for "star rating". (This rating has been valid since February 2011, last checked June 2014)



    • Construction - Figure-8 arrangement using stranded conductor around an X-Tube™ Aircore
    • No. of strands per conductor - Triple braid arrangement of 16 groups of 5 x 0.1mm conductor strands, 3 braids-1 inside the other
    • Conductor Material - 99.999% Silver Plated, Oxygen Free Copper
    • AV4Home Awarded QED Retailer of the YearAircore Material - Low density, Red, Black, Yellow, and Blue colour-coded Polyethylene
    • Dielectric Material - High performance, low density Clear Polyethylene with central spacer between the 2 sides
    • Dielectric Outer Diameter - 3.90mm x 2
    • Cross-sectional Area - 1.50mm²
    • Loop Resistance - 0.021 O/m
    • Capacitance - 50 pF/m
    • Inductance - 0.47 µH/m
    • Disipation Factor - 0.0006


    FeeFo Reviews

    Date / Score
    Customer Comment Our Response
    16-Jan-2015 Service: Product:
    Service rating : Excellent service, fast delivery
    Product : Great looking cable, but not sure if Bi-Wire was the right choice for me.
    04-Jan-2013 Service: Product:
    Good product, promptly delivered and well packaged.
    05-Dec-2012 Service: Product:
    Read more reviews on Feefo
    Q: Does this cable have four plugs at each end or does it have two at the amp end and four at the speaker end? ( each cable that is). Posted On: 21/11/2013 By: Garth Ellis
    A: There are four cables at each end on this bi-wire cable. We can terminate the cable so that you have only two ends on either the amplifier or speaker end. When we do this we simply join the cables up to make two ends out of 4. See the product options above.

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  • Image of a complete drum of QED Reference Silver Anniversary XT Bi-Wire Speaker Cable QED Reference Silver Anniversary XT Bi-Wire Speaker Cable - Drum of 100m

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  • Image of the QED Reference Silver Anniversary XT Speaker Cable - Drum of 100m QED Reference Silver Anniversary XT Speaker Cable - Drum of 100m

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