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QED Genesis Silver Spiral

QED Genesis Silver Spiral

Model Code: C-GNSS/50
Retail: R 1 355.00

QED Genesis Silver Spiral Bi-Wire

QED Genesis Silver Spiral Bi-Wire

Model Code: C-GNSSBW/30
Retail: R 2 255.00

QED Micro Speaker Cable 30m

THIS AWARD WINNING PERFORMANCE MICRO CABLE BRINGS YOU A MINIATURE SIZED DISCREET CABLE THAT DOES NOT COMPROMISE ON QUALITY

Performance Micro uses a miniature figure ‘8’ construction which allows it to be used in the most  demanding situations. This cable features advanced materials to enable top quality sound in a discreet cable that can be hidden behind skirting boards or under carpets


HIGH PERFORMANCE LOW DENSITY POLYETHYLENE DIELECTRIC
Cuts down on the amount of audio signal energy lost due to cable capacitance

MINIATURE FIGURE ‘8’ CONFIGURATION
Enables Micro to be used in the most demanding of discreet set ups without sacrificing quality

IDEAL FOR USE IN HOME CINEMA OR BOOKSHELF SPEAKER INSTALLATIONS
The cable can follow the contours of the room and remain in place

99.999% OFC CONDUCTORS
Provides a low resistance pathway for the audio signal and delivers stunning high frequency detail

SPECIFICATIONS
Wire gauge - 17 AWG
Jacket OD - 2.40mm
Cross-sectional area - 1.25mm²
Loop resistance - 0.0290 ?/m
Capacitance - 25pF/m
Inductance - 0.63 µH/m
Dissipation factor - 0.0020

Model Code: C-QM/30
Retail: R 1 880.00

QED Performance Micro Silver 1m

QED Performance Micro Silver 1m

Model Code: C-QSM/100
Retail: R 150.00

QED Performance Original 100m

Original builds on the qualities of QED 79 Strand by adding a low density polyethylene dielectric to cut down on the amount of audio signal energy lost due to cable capacitance. 99.999% oxygen free copper conductors and optimised geometry are used to deliver the superb sound quality of this lowcost cable.

Model Code: C-QO/100
Retail: R 8 600.00

QED Performance Original Bi-Wire 50m

QED Performance Original Bi-Wire

Model Code: C-QBO/50
Retail: R 10 500.00

QED Profile 42 Strand

QED Profile 42 Strand

Model Code: C-42/100W
Retail: R 3 100.00

QED Profile 79 Strand

QED Profile 79 Strand

Model Code: C-79/100W
Retail: R 5 975.00

QED Reference XT40 X-Tube Spk Cable 50m

XT40 CELEBRATES QED's 40 YEARS OF AWARD WINNING BRITISH HERITAGE. WINNER OFBEST SPEAKER CALE AT THIS YEARS WHAT HI-FI? AWARDS. Acclaimed by What HI-FI? Magazine this Five Star awardwinning pure copper loudspeaker cable boasts QED's advanced X-TubeTM technology and a massive 4mm2 cross sectional area. This results in a cable that delivers clear sonic advantages over conventional cable designs by maintaining a flat frequency response within the audio band. We are so confident about the performance of the new XT40, we urge enthusiasts to audition and compare it, not only to their favourite cable but also to alternative models at any price. Prepare to be surprised!

Model Code: QE1340
Retail: R 11 100.00

QED RUBY pre-term speaker cable (2m)

RUBY ANNIVERSARY EVOLUTION, FORTY YEARS OF EXPERIENCE ACROSS THE SPECTRUM.
The What Hi-Fi? Five Star award winning Ruby Anniversary Evolution cable is a completely new speaker cable from QED laboratories in celebration of FORTY years at the forefront of UK speaker cable design. It utilizes QED “Aircore Technology™” in a new miniature format to bring high end cable philosophies to the budget hi-fi market. It builds on the success of the XT Evolution and Ruby Anniversary cables with which it shares a family heritage but now incorporates increased conductor spacing to further reduce losses and distortions caused by cable capacitance.

Model Code: QE1420
Retail: R 1 840.00

QED Signature Revelation 1m

QED Signature Revelation 1m

Model Code: C-QEDREV/50
Retail: R 510.00

QED Silver Anniversary XT 100m

QED Silver Anniversary XT

Model Code: C-QSAXT/100
Retail: R 17 750.00

QED Silver Anniversary XT Bi-wire 1m

QED Silver Anniversary XT Bi-wire 1m

Model Code: C-QSAXTBW/50
Retail: R 380.00

QED Silver XT preterm speaker cable (2m)

THE MULTI-AWARD WINNING SILVER ANNIVERSARY XT CABLE DELIVERS SUPERIOR PERFORMANCE FOR ALL YOUR HI-FI AND HOME THEATRE NEEDS
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

Model Code: QE1430
Retail: R 2 405.00

QED Supremus Speaker Cable (4m)

The largest cross sectional area of pure copper ever incorporated into a QED loudspeaker cable, enables Supremus to deliver the ultra-low resistance required to ensure perfect fidelity of the musical signal.

AirCore™ Technology, unique to QED cables, means unrivalled high frequency detail, rhythm and timing.

Supremus boasts sixteen silver plated, 99.999% oxygen free copper, solid core conductors. To deliver its no compromise sonic performance, each individual conductor is insulated by a nearly invisible layer of enamel, providing ultimate insulation for a more detailed output.

Model Code: QE0005pr
Retail: R 32 990.00
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QED XT25 50m

The QED speaker cable story began in 1973, with the launch of the world’s first specialist speaker cables, QED 42 and 79 strand, now household names in the audio industry. Building on this longstanding British speaker cable heritage, QED embarked on an exhaustive research program into cable parameters which began in 1995 and continues into 2017 with the release of “The Sound of Science”, a 40 page White Paper distilling the research published since 1973 by QED.

These reports set out the “top down” design-principles that have resulted most recently in the development of QED XT25 loudspeaker cable – the new class leading standard in budget to mid-range speaker cables.

What are the features which make this cable so special?

X-Tube™ technology first came to prominence in 2005 with the launch of the world renowned Silver Anniversary XT, the most highly awarded mid-range cable in the world, winning the What Hi-Fi Product of the Year three years in a row. These design principles also grace the multiple award winning XT40 speaker cable and XT25.

As frequency increases, electrons flow more and more towards the periphery of a conductor so that if the frequency is high enough only a very thin layer (or skin) on the outside of the conductor is used. This “skin depth” varies for different materials at a fixed frequency and in copper it means that if a conductor has larger than 0.66 mm2 cross-sectional area not all of that area is available for an analogue music signal to use. In SAXT the “skin effect” problem was effectively eliminated by the use of X-Tube™ Technology which works by placing all of the conducting material around a central hollow insulating rod. However, for a.c. signals, changing magnetic fields generated by the flow of current set up eddy currents in nearby conductors which force current to flow only in areas furthest away from conductors carrying current in the same direction and vice versa.

his “proximity effect” has a detrimental influence on current distribution in a speaker cable even if it utilises X-Tube™ Technology. With XT25 we tackle the proximity effect and the skin effect by combining our existing Aircore™ and X-Tube™ Technologies into a new X-Tube™ variation. By forming the conductors into a tube-like shape with a hollow centre, current densities at higher frequencies are maintained because the electric field which contributes towards the skin effect acts towards the centre of the conductor from where the conductive material has been removed. At the same time instead of using a braided structure a ring of conductors is formed into separate bundles with only a loose electrical association which are then twisted into a 90 mm lay so that no single conductor bundle remains on the inside or outside of the cable (and therefore prey to the proximity effect) for long enough for it to become an audible problem. This geometry promotes a more consistent signal distribution making for a more accurate musical reproduction.

Low DC Resistance
At QED we recognise that low d.c. resistance of the loudspeaker cable is of paramount importance for high-fidelity signal transfer. This is because the speaker presents a frequency dependent load to the amplifier of which the cable forms a variable proportion. If resistance is allowed to be too large then audible changes to the frequency response characteristics of the loudspeaker will be introduced which cannot be corrected for by the amplifier’s negative feedback loop. In order to provide a marked improvement over similarly priced cables in both our own and our competitors’ ranges without increasing the overall size and flexibility of the cable substantially, the cross-sectional area (CSA) of XT25 has been enlarged to 2.5mm2 of 99.999% oxygen-free copper. This instantly gives the new cable a low d.c. resistance and therefore a more accurate musical delivery.


Low-Loss Dielectric
It is not generally appreciated that the electrical signals moving at or near the speed of light in a wire do so via the medium of electromagnetic (EM) waveforms which exist within the dielectric which surrounds the conductors as well as within the conductors themselves. The movement of electrons along the conductor merely facilitates generation of the EM waveform as their “drift velocity” is only a few centimetres per second. It is therefore important to ensure that the dielectric material used to insulate and protect the central conductors of the speaker cable is of a type which “permits” the establishment of EM waveforms without appreciable loss. Dielectric losses are directly proportional to the “permittivity” of the material used and as this a measure of each material relative to that in a vacuum it should be as close to unity as possible. Like its predecessors, XT25 uses a specially formulated low-density polyethylene (LDPE) dielectric which at 1.69 has the lowest relative permittivity practically available.

QED research has shown that low capacitance cables are generally preferred in listening tests over high capacitance counterparts and this is usually because low-loss dielectrics have been utilised. The use of LDPE and careful control of conductor spacing results in a cable with a very low capacitance per meter and a dissipation factor (loss tangent) of 0.0001 at 10 kHz.

What makes XT25 unique?

1. Award winning heritage guaranteed
All QED cables are designed using the top down principle. XT25 represents the core musical performance trickled down from our money-no-object Supremus cable in a more affordable package. QED has won more What Hi-fi? Awards than any other single brand and with XT25 this heritage is delivered at a sensible price. Unlike most other manufacturers, QED offer an unlimited lifetime guarantee which means that if your cable ever fails to deliver to its full potential during its lifetime we will replace it free of charge.

2. X-Tube™ Technology....but with a twist
In loudspeaker cables high pitched sounds are forced to travel towards the outside of the conductor and so are able to use less and less of the available cross-sectional area as the pitch increases. This is called the “Skin Effect”. It means that for high frequencies the resistance of the cable appears to be much higher than it does for lower pitched sounds. Eddy currents in one conductor can affect the current flowing in an adjacent conductor so that currents flowing in the same direction move away from each other. This “Proximity Effect” also increases resistance as frequency increases. These phenomena have a detrimental effect on the fidelity of the sound you hear. The XT25 variation of QED X-Tube™ Technology solves these problems by creating a hollow tubular conductor geometry out of individual conductor bunches through which each frequency can pass with equal ease when compared to traditional solid or stranded conductors.

3. Low-Loss Dielectric
Music signals in a loudspeaker cable move back and forth many times every second. The insulating material used to separate the send and return conductors from each other (the dielectric) has to be charged and discharged every time. Not all of the energy stored in the dielectric during each charge cycle is completely returned during each discharge cycle which has a detrimental effect on the fidelity of the sound you hear. That’s why at QED we use low-loss dielectric materials such as Polyethylene (PE) or Teflon™ (PTFE) in preference to cheaper PVC alternatives found in inferior unbranded cables.

4. 99.999% Oxygen-Free Copper
Speaker cables need to have a large current carrying capacity. If the electrical resistance of the cable is too large, part of the music signal will be lost, causing a detrimental effect on the fidelity of the sound you hear. To stop this from happening we make the resistance of our speaker cables as small as possible. We do this by using the largest practical cross-sectional area of copper within the size constraints of each cable. In order to squeeze the last drop of performance from the conductors we make sure that there are no impurities in the copper which would defeat the object of making them so large. That’s why we use 99.999% oxygen-free copper exclusively.

5. Just Listen
Unique proprietary technology and trademarked geometries plus our award winning heritage all combine to create audible sonic improvements when compared to other loudspeaker cables.

Ask your dealer for an audition – he will be happy to let you hear the difference.

Specifications:
Cross-sectional area - 2.5 mm2
Wire gauge - 14 AWG
Jacket outside diameter - 3.96 mm
Loop inductance - 0.52 µH/m
Loop resistance - 13.4 mO/m
Capacitance - 35.0 pF/m
Dissipation factor @ 10 kHz - 0.0001
Conductors - 10 x 19/0.13 mm
Insulation - LDPE jacket with 100% coverage of Aluminium Mylar tape wrap
Plugs and spades - QED Airloc™ Forte banana plugs

Model Code: QE1325
Retail: R 7 340.00

QED XT25 Pre-Term Speaker Cable 2m PR

The QED speaker cable story began in 1973, with the launch of the world’s first specialist speaker cables, QED 42 and 79 strand, now household names in the audio industry. Building on this longstanding British speaker cable heritage, QED embarked on an exhaustive research program into cable parameters which began in 1995 and continues into 2017 with the release of “The Sound of Science”, a 40 page White Paper distilling the research published since 1973 by QED.

These reports set out the “top down” design-principles that have resulted most recently in the development of QED XT25 loudspeaker cable – the new class leading standard in budget to mid-range speaker cables.

What are the features which make this cable so special?

X-Tube™ technology first came to prominence in 2005 with the launch of the world renowned Silver Anniversary XT, the most highly awarded mid-range cable in the world, winning the What Hi-Fi Product of the Year three years in a row. These design principles also grace the multiple award winning XT40 speaker cable and XT25.

As frequency increases, electrons flow more and more towards the periphery of a conductor so that if the frequency is high enough only a very thin layer (or skin) on the outside of the conductor is used. This “skin depth” varies for different materials at a fixed frequency and in copper it means that if a conductor has larger than 0.66 mm2 cross-sectional area not all of that area is available for an analogue music signal to use. In SAXT the “skin effect” problem was effectively eliminated by the use of X-Tube™ Technology which works by placing all of the conducting material around a central hollow insulating rod. However, for a.c. signals, changing magnetic fields generated by the flow of current set up eddy currents in nearby conductors which force current to flow only in areas furthest away from conductors carrying current in the same direction and vice versa.

his “proximity effect” has a detrimental influence on current distribution in a speaker cable even if it utilises X-Tube™ Technology. With XT25 we tackle the proximity effect and the skin effect by combining our existing Aircore™ and X-Tube™ Technologies into a new X-Tube™ variation. By forming the conductors into a tube-like shape with a hollow centre, current densities at higher frequencies are maintained because the electric field which contributes towards the skin effect acts towards the centre of the conductor from where the conductive material has been removed. At the same time instead of using a braided structure a ring of conductors is formed into separate bundles with only a loose electrical association which are then twisted into a 90 mm lay so that no single conductor bundle remains on the inside or outside of the cable (and therefore prey to the proximity effect) for long enough for it to become an audible problem. This geometry promotes a more consistent signal distribution making for a more accurate musical reproduction.

Low DC Resistance
At QED we recognise that low d.c. resistance of the loudspeaker cable is of paramount importance for high-fidelity signal transfer. This is because the speaker presents a frequency dependent load to the amplifier of which the cable forms a variable proportion. If resistance is allowed to be too large then audible changes to the frequency response characteristics of the loudspeaker will be introduced which cannot be corrected for by the amplifier’s negative feedback loop. In order to provide a marked improvement over similarly priced cables in both our own and our competitors’ ranges without increasing the overall size and flexibility of the cable substantially, the cross-sectional area (CSA) of XT25 has been enlarged to 2.5mm2 of 99.999% oxygen-free copper. This instantly gives the new cable a low d.c. resistance and therefore a more accurate musical delivery.


Low-Loss Dielectric
It is not generally appreciated that the electrical signals moving at or near the speed of light in a wire do so via the medium of electromagnetic (EM) waveforms which exist within the dielectric which surrounds the conductors as well as within the conductors themselves. The movement of electrons along the conductor merely facilitates generation of the EM waveform as their “drift velocity” is only a few centimetres per second. It is therefore important to ensure that the dielectric material used to insulate and protect the central conductors of the speaker cable is of a type which “permits” the establishment of EM waveforms without appreciable loss. Dielectric losses are directly proportional to the “permittivity” of the material used and as this a measure of each material relative to that in a vacuum it should be as close to unity as possible. Like its predecessors, XT25 uses a specially formulated low-density polyethylene (LDPE) dielectric which at 1.69 has the lowest relative permittivity practically available.

QED research has shown that low capacitance cables are generally preferred in listening tests over high capacitance counterparts and this is usually because low-loss dielectrics have been utilised. The use of LDPE and careful control of conductor spacing results in a cable with a very low capacitance per meter and a dissipation factor (loss tangent) of 0.0001 at 10 kHz.

What makes XT25 unique?

1. Award winning heritage guaranteed
All QED cables are designed using the top down principle. XT25 represents the core musical performance trickled down from our money-no-object Supremus cable in a more affordable package. QED has won more What Hi-fi? Awards than any other single brand and with XT25 this heritage is delivered at a sensible price. Unlike most other manufacturers, QED offer an unlimited lifetime guarantee which means that if your cable ever fails to deliver to its full potential during its lifetime we will replace it free of charge.

2. X-Tube™ Technology....but with a twist
In loudspeaker cables high pitched sounds are forced to travel towards the outside of the conductor and so are able to use less and less of the available cross-sectional area as the pitch increases. This is called the “Skin Effect”. It means that for high frequencies the resistance of the cable appears to be much higher than it does for lower pitched sounds. Eddy currents in one conductor can affect the current flowing in an adjacent conductor so that currents flowing in the same direction move away from each other. This “Proximity Effect” also increases resistance as frequency increases. These phenomena have a detrimental effect on the fidelity of the sound you hear. The XT25 variation of QED X-Tube™ Technology solves these problems by creating a hollow tubular conductor geometry out of individual conductor bunches through which each frequency can pass with equal ease when compared to traditional solid or stranded conductors.

3. Low-Loss Dielectric
Music signals in a loudspeaker cable move back and forth many times every second. The insulating material used to separate the send and return conductors from each other (the dielectric) has to be charged and discharged every time. Not all of the energy stored in the dielectric during each charge cycle is completely returned during each discharge cycle which has a detrimental effect on the fidelity of the sound you hear. That’s why at QED we use low-loss dielectric materials such as Polyethylene (PE) or Teflon™ (PTFE) in preference to cheaper PVC alternatives found in inferior unbranded cables.

4. 99.999% Oxygen-Free Copper
Speaker cables need to have a large current carrying capacity. If the electrical resistance of the cable is too large, part of the music signal will be lost, causing a detrimental effect on the fidelity of the sound you hear. To stop this from happening we make the resistance of our speaker cables as small as possible. We do this by using the largest practical cross-sectional area of copper within the size constraints of each cable. In order to squeeze the last drop of performance from the conductors we make sure that there are no impurities in the copper which would defeat the object of making them so large. That’s why we use 99.999% oxygen-free copper exclusively.

5. Just Listen
Unique proprietary technology and trademarked geometries plus our award winning heritage all combine to create audible sonic improvements when compared to other loudspeaker cables.

Ask your dealer for an audition – he will be happy to let you hear the difference.

Specifications:
Cross-sectional area - 2.5 mm2
Wire gauge - 14 AWG
Jacket outside diameter - 3.96 mm
Loop inductance - 0.52 µH/m
Loop resistance - 13.4 mO/m
Capacitance - 35.0 pF/m
Dissipation factor @ 10 kHz - 0.0001
Conductors - 10 x 19/0.13 mm
Insulation - LDPE jacket with 100% coverage of Aluminium Mylar tape wrap
Plugs and spades - QED Airloc™ Forte banana plugs

Model Code: QE1460
Retail: R 1 525.00

QED XT40 pre-term speaker cable (2m)

XT40 CELEBRATES QED'S 40 YEARS OF AWARD WINNING BRITISH HERITAGE. WINNER OF 'BEST SPEAKER CABLE' AT THE 2014 WHAT HI-FI? AWARDS.
Acclaimed by What HI-FI? Magazine; this 'Five Star' award winning pure copper loudspeaker cable boasts QED's advanced X-TubeTM technology and a massive 4mm2 cross sectional area. This results in a cable that delivers clear sonic advantages over conventional cable designs by maintaining a flat frequency response within the audio band.

We are so confident about the performance of the new XT40, we urge enthusiasts to audition and compare it, not only to their favourite cable but also to alternative models at any price.

Prepare to be surprised!

Sold in pairs and are terminated with heatshrink QED Airloc 4mm banana plugs.

Model Code: QE1450
Retail: R 2 930.00

QED XT400 X-TUBE Spk Cable 1m

QED X-Tube XT400 

Model Code: C-XT400/50
Retail: R 685.00

QED XTC pre-term speaker cable (3m)

XTC utilizes the same  technology as Silver Anniversary X-Tube but with the removal of the silver plating and extra wide conductor spacing it aims at a warmer and rounder sound compared to its more expensive sibling.

HIGH PERFORMANCE LOW DENSITY POLYETHYLENE DIELECTRIC
Cuts down on the amount of audio signal energy lost due to cable capacitance

X-TUBE™ TECHNOLOGY
At low frequencies both X-TubeTM and conventional stranded/solid core speaker cables convey signals in a linear way. However, at high frequencies, X-TubeTM retains a near-linear signal transfer, whereas the conventional cable fails to conduct uniformly across the entire conductor area. The result is that X-TubeTM delivers greater fidelity across the audio spectrum which would otherwise be lost in ordinary cables.

99.999% OXYGEN FREE COPPER CONDUCTORS
Provides a low resistance path for the audio signal

SPECIFICATIONS
Ideal for use in all installations
High performance low-density Polyethylene dielectric
99.999% OFC conductor
X-Tube™ technology
3 x braids of 16 x 5/0.09mm stranding 
Hollow PE central core of 1.5mm OD 
Jacket OD - 4.00mm
Wire gauge 17 AWG
Cross-sectional area - 1.50mm²
Loop resistance - 0.025 ?/m
Capacitance - 17pF/m
Inductance - 0.69 µH/m
Dissipation factor - 0.0006
Ideal for use in all installations

Model Code: QE1412
Retail: R 1 735.00