QED X-Tube XT-400 Speaker Cable

£15.99

Retail Price: ~~£20.00~~
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The flagship Aircore™ cable. Silver Plated Oxygen Free Copper tubular conductor geometry. For use in the finest hi-fi and home theatre systems.

X-TUBE™ with Aircore™ technology is a genuine breakthrough in loudspeaker cable design. This cable range delivers many of the attributes of our world-renowned Genesis Silver Spiral cables - superb transparency, dynamics and control - in a more compact cable format.

X-TUBE™ is designed to be the natural upgrade for anyone using QED’s Silver Anniversary speaker cables or those simply wanting the best performance for their hi-fi or home theatre system.

The construction of these cables is uniquely QED: multiple Silver Plated conductors surrounding a polyethylene core, precise spiral geometry within the transparent outer jacket and excellent shielding. A truly balanced design that has been universally praised by the world’s specialist press as a true high-end performer.

"...the XT-400 delivers - in spades. Detail resolution is wonderful and this cable reveals the finer points of complex tunes at even low
volumes What HiFi Magazine

The QED XTUBE XT-400 Anniversary connects your Amplifier to your speakers.

FEATURES

QED X-Tube XT-400 Speaker Cable

Massive 2 x 4mm2 conductor crosssectional area

99.999% Silver Plated Oxygen Free Copper stranded braid conductors

Compact figure ‘8’ construction

Polyethylene AirCore™

Copper Mylar conductive wrap

PTFE tape wrap, PVC outer jacket.

Dimensions 12.7 x 6mm.

Terminal connectors - Optional. Choice of AIRLOC Banana or AIRLOC Spade terminal plugs

Lifetime Warranty.

X-TUBE™ WITH AIRCORE™ TECHNOLOGY – HOW IT WORKS.

One of the big problems as cable conductor size increases, is how to keep the inductance low. 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 our Genesis Silver Spiral loudspeaker cables. 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.

THE SIGNAL

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.

TERMINATION

We can terminate your cable with QED's superb 24 Carat gold plated AIRLOC termination plugs. AIRLOC is QED's specialised loudspeaker termination method and offers the very best termination with QED speaker cables. This is a solder-free, airtight fusion between the cable and plug and offers optimum signal transfer, excellent signal quality and perfect long-term performance.

HOW TO ORDER

Simply select the length of cable, the type of plug and the termination required (one end or both ends) from the drop-down menus above and click on the 'Buy' button to add the item to your basket. Your cable will be dispatched within 24 hours subject to Future Shop Terms & Conditions.

Keywords xtube, xt400, qed x-tube, qed xt-400

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(1 Reviews)

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Product Reviews for QED X-Tube XT-400 Speaker Cable

Submitted By: Cyril Damestoy on 03/12/2007
Oh my god... excellent cable, impressive upgrade from my Ecosse CS4.4!!! I'm living in Belgium and I received this cable 3 working days after my order, very quick delivery, special thanks to Adam ^^ I use 2x XT400 cable per front speaker (bi-amplification) and 1 XT400 for the center speaker (B&W 804S and HTM3S, surround are 805S with Silver Anniversary XT, electronic is Rotel RSP1098 and RMB1077, sources are Marantz SA15S1, DV6001 and Panasonic BD10A). What's best now? Stronger and cleaner low frequencies, very deep bass, detailed medium more than in the past, very analytic high medium and tembles but not too brilliant, no, very well balanced , at the end a very large bandwitch with high level of dynamic, details, and timbres. Plenty of new informations are now accessible with my system that was not poor in the past but now really optimized, using the XT400 from QED is like removing a curtain between my speakers and me. I also get a larger stereo and multichannel area, the sound spacialization is better, 3D deep effect vertically and horizontally. For sure this upgrade was a very good idea! I've also tested at the same price leve, the Ecosse MS2.3, MIT AVT3 cables and I feel better with the QED cable on my system (well in my system I assume that this may not be the same result with other components). This is a great upgrade for my system for sure, and I think I'll discover new subtleties in the next days! Thank you Futureshop for the excellent service and advice. The ailock banana plugs are very well mounted, and connexion with my system is strong and optimal. Airlock is a must-to-have accessory! Don't hesitate too much between XT350 or 400, go directly to the 400 it's not so much expensive and you'll not ask you the question in the future ''maybe I had to choose the 400 instead of the 250'' ;o) Cyril from Belgium.

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