QED celebrates 50 years with special edition Golden Anniversary XT speaker cable featuring X-Tube™ Plus technology

British audio specialist QED celebrates its 50th anniversary in style, with the introduction of its Golden Anniversary XT speaker cable. Representing the culmination of five decades of dedicated and extensive research, engineering and audio expertise, Golden Anniversary XT speaker cable is the ideal upgrade for any hi-fi enthusiast who wants to experience the sonic benefits of a high-end speaker cable – but at a real-world price.

Key features at a glance

  • NEW X-Tube™ Plus technology combines X-Tube™ with Aircore™ to deliver an even, consistent performance across the entire audible frequency range.
  • Ultra-pure Ohno Continuous Cast Copper and 99.999% oxygen-free copper conductor blend helps improve the signal path and signal retention.
  • Low Loss Ultra-Uniform Dielectric insulation boosts efficiency and reduces signal loss.
  • Airloc™ Forte banana plugs use a cold weld system for permanent attachment to the cable for improved contact area and reduced resistance.

50 years of innovation

QED has been designing and engineering class-leading and award-winning analogue and digital cables for five decades – and the Golden Anniversary XT is the latest demonstration of the company’s expertise.

Quality Electronic Design (QED) was formed in 1973 by forward-thinking hi-fi enthusiasts, Bob Abraham and Ian Vine. The company is now considered the original cable brand, having released QED 79 Strand, widely recognised as the world’s first “specialist” loudspeaker cable. This product demonstrated how cables could have a tangible impact on audio performance.

QED’s Genesis Report on loudspeaker cable design followed. This research established scientifically proven principles, which are as valid today as they were 28 years ago and informs all QED cable designs, including the pioneering X-Tube™ technology that enables precise and consistent signal delivery across the entire frequency range.

X-Tube™ Plus technology

QED’s innovative and proven X-Tube™ technology places a cable’s conductive material around a central hollow insulating rod – and the result is the elimination of the ‘skin effect’ that would otherwise force high-frequency analogue music signals to the outside of the conductor. And by combining X-Tube™ technology with its equally effective Aircore™ technology, QED also reduces the ‘proximity effect’ that can disrupt current distribution in a speaker cable. The result is X-Tube™ Plus: a ground-breaking cable geometry that ensures Golden Anniversary XT is a speaker cable with even, consistent performance across the entire audible frequency range. 

Ultra-Pure Ohno Continuous Cast Copper conductors

Golden Anniversary XT uses a unique hybrid blend of 99.999% oxygen-free copper (‘OFC’) and Ultra-Pure Ohno Continuous Cast Copper (‘UP-OCC’) to give the improved signal path and outstanding signal retention of ultra-pure copper conductors – but at a fraction of the price. Thanks to class-leading research and engineering, QED Golden Anniversary XT is the most affordable and attainable speaker cable to exploit the advantages of the continuous-casting process, with this hybrid theoretically improving the path for transients and high frequency detail not available using just OFC alone.

Low-Loss Ultra-Uniform Dielectric insulation

If a speaker cable is to perform to its maximum potential, it’s important that the dielectric material which insulates and protects the central conductors of the cable does so efficiently. Golden Anniversary XT uses a specially developed and formulated low-density polyethylene (‘LDPE’), which works in unison with the cable’s X-Tube Plus configuration to deliver a speaker cable that has high-efficiency and a dissipation factor that is barely measurable. 

Airloc™ Forté banana plugs

Airloc™ is a specially developed cold-weld system for permanently attaching QED Forté banana plugs to the company’s entire range of speaker cables, Golden Anniversary XT included. The most vulnerable area of the speaker cable chain is the physical interface between the cable and the speaker or amplifier to which it’s connected – without effective termination, oxidation can occur, degrading the cable’s performance. By using a cold weld crimp-type termination, Forté banana plugs offer maximum resistance to oxidation – for the lifetime of the cable – by effectively turning the cable and the plug into a single, unified object.

QED Golden Anniversary XT is available now from QED retailers priced: £27 / €35 / $40 per metre.

And in pre-terminated options (available November 2023):

QED Golden Anniversary XT 2M: £219.95 / $329.00 / €289.00

QED Golden Anniversary XT 2.5M: £249.95 / $379.00 / €319.00

QED Golden Anniversary XT 3M: £279.95 / $429.00 / €349.00

QED Golden Anniversary XT 5M: £399.95 / $599.00 / €499.00

Learn more at (UK) (US)

Download QED Golden Anniversary XT White Paper

Download QED 2023 Brochure

Technical specification

Cross-sectional area: 2.5 mm2

Wire gauge: 14 AWG

Jacket outside diameter: 11.5 mm

Loop inductance: 0.58 μH/m

Loop resistance: 14.8 mΩ/m

Capacitance: 42.0 pF/m

Dissipation factor @ 10 kHz: 0.009

Conductors: 9 x 19/0.13 mm OFC + 1 x 19/0.13 UP OPCC

Insulation: LDPE jacket with 100% coverage of golden/mylar tape wrap

Plugs and spades: QED Airloc™ Forte banana plugs

To find out more about the QED Golden Anniversary XT loudspeaker cable and discover other QED products please visit (UK) and (US)



QED’s new Reference Ethernet cable has the bandwidth and headroom to deal with the highest of high-resolution audio – and beyond

British audio specialist QED introduces its Reference Ethernet cable, designed to provide the most accurate, most stable connection possible between networked devices. Perfect for connecting a high-resolution digital audio streamer to a local network, the Reference Ethernet has more than enough bandwidth to deal with the data rates required by 32 bit/384 kHz and DSD512 audio files. Painstakingly engineered, Reference Ethernet is a Class I Category 8.1 cable and can support 40G Ethernet – and so has the headroom to cope with even the most data-intensive applications.

Key features at a glance

  • Specifically designed for high-resolution audio up to 32 bit/384 kHz or DSD512 quality
  • Complies with Class I Category 8.1 standard
  • Supports 40G Ethernet
  • Ferrite insulation, low-loss dielectric and gold-plated Telegärtner plugs combine to deliver
    ultra-low jitter
  • 99.999% OFC, 24 AWG conductors with customised twist rates for lower inter-pair cross-talk
  • Arrives in stylish White Pearl finish

Specified to perform

QED has been designing and engineering class-leading and award-winning analogue and digital cables for almost 50 years – and the Reference Ethernet is the latest demonstration of the company’s expertise.

In order to keep signal noise and cross-talk to an absolute minimum, Reference Ethernet uses 99.999 % oxygen-free copper twisted-pairs – with a dissimilar twist rate for each pair – to maximise noise-rejection characteristics.

For minimal ‘insertion loss’ – which is the reduction of signal strength at the end of the cable compared to that at the start – Reference Ethernet uses an aluminium mylar wrap, within a foil wrap, within a ferrite-impregnated jacket. As a result, the cable comfortably exceeds the CAT 8 insertion loss standard. This over-specified arrangement also means Reference Ethernet easily outperforms the CAT 8 standard for ‘attenuation-to-crosstalk ratio’ which is an indicator of the margin by which it avoids introducing any errors into the data stream.

Reference Ethernet also performs way beyond the CAT 8 requirements where ‘return loss’ is concerned. Any impedance mismatch between the cable and the equipment it’s connected to can cause the signal to be reflected back and forth. Thanks to its precision-engineered, gold-plated  Telegärtner plugs with 360-degree shielded die-cast zinc bodies, reflections are minimised and all of the signal is delivered to the load. 

This uncompromised specification and state-of-the-art engineering results in a cable with a maximum data rate of 40 Gb/s. This is well in excess of what is required to handle even the most demanding data streams, and means Reference Ethernet is easily able to cope with the highest of today’s high-resolution digital audio files and is future-proofed to handle whatever comes next.

The cable is finished in a stylish pearl white PVC jacket to compliment any hi-fi set-up.

The QED Reference Ethernet is available now from (UK) and Independent retailers in the UK and from (US) and Independent retailers from next month, priced:

1M – £149 / €189 / $199

2M – £159 / €199 / $209

3M – £179 / €229 / $229

5M – £199 / €249 / $249

Technical specification

Cable OD (mm): 9 mm

Plugs: Telegärtner Profinet CAT 8

Construction: F/FTP

Conductor size: 24 AWG

Characteristic Impedance: 100 ohm

Patch Cable Category: Class I CAT 8.1

Maximum bit-rate: 40 Gb/s

To buy the QED Reference Ethernet cable and discover other QED products please visit