QED Reference XT40i: an Award-winning speaker cable improved

QED Reference XT40i: an Award-winning speaker cable improved
(Image credit: QED)

We may live in a world that's increasingly wireless this and untethered that, but the humble analogue cable still plays a vital role in connecting traditional hi-fi to ensure music playback sounds its very best. 

QED knows a thing or two about what's required from speaker cables and interconnects to preserve an audio signal – it's been behind many a What Hi-Fi? Award winner and five-star cable, after all, three of which are now being replaced by new and improved versions expected in October.

Up first: the QED Reference XT40i speaker cable. An update to the XT40, winner of the 'Best speaker cable' What Hi-Fi? Award in 2014, it builds on its predecessor’s design with a newly developed Air Gap dielectric construction. QED claims this reduces the cable’s dissipation factor and capacitance by half, promising a wider, more musical and bass-tight performance. Also in the name of improved sound quality, the XT40i utilises QED’s proprietary X-Tube technology, which was first introduced in the company’s Award-winning Silver Anniversary XT cables over a decade ago. 

Its 99.999 per cent oxygen-free copper build offers improved conductivity over standard copper, too, while its significant 4.0mm² cross-sectional area has been chosen to lower loop resistance.

The QED Reference XT40i is priced £11/m, while pre-terminated 2m, 3m and 5m lengths cost £109.95/$129, £129.95/$159 and £169.95/$199 respectively.

(Image credit: QED)

The QED XT25 Bi-Wire, meanwhile, is, as its name suggests, a bi-wire version of QED’s XT25 speaker cable. Priced £12/m, it brings the company’s aforementioned X-Tube cable technology and X-Quad geometry (which lowers inductance in an effort to reveal more detail) to an affordable bi-wire or bi-amp speaker cable.

Like the XT40i, it has a 99.999 per cent Oxygen-free copper construction, as well as a low density Polyethylene jacket whose purpose it to minimise electrical energy loss in the cable compared with cheaper PVC alternatives.

(Image credit: QED)

Last but not least if you’re in the market for an analogue interconnect, the QED Performance Audio 40i, is a “complete overhaul” of the five-star Performance Audio 40, with improvements spanning most areas of its construction. A QED first, it uses Solid Core Complementary Conductors, which supposedly reduce capacitance by a quarter compared to the original model, resulting in a larger soundstage.

QED has chosen to implement two cables (one Oxygen Free Copper Conductor and one Silver Plated Oxygen Free Copper Conductor) in the design to carry the same audio signal in an effort to reduce the smearing between high and low frequencies. Like its predecessor, the Performance Audio 40i utilises Ferrite insulation to absorb signal noise for a cleaner delivery.

The QED Performance Audio 40i costs £39.95/$49 for a 0.6m length, with 1m, 2m and 3m variants are priced £49.95/$59, £69.95/$85 and £79.95/$95 respectively.


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Becky Roberts

Becky is the managing editor of What Hi-Fi? and, since her recent move to Melbourne, also the editor of Australian Hi-Fi magazine. During her 10 years in the hi-fi industry, she has been fortunate enough to travel the world to report on the biggest and most exciting brands in hi-fi and consumer tech (and has had the jetlag and hangovers to remember them by). In her spare time, Becky can often be found running, watching Liverpool FC and horror movies, and hunting for gluten-free cake.