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QED Supremus Loudspeaker Cable Pair 4m


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Condition: New

Brand-new, unused, unopened and undamaged item in original retail packaging (where applicable).


Limited life time Warranty.  More info

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Handmade In The UK

Handmade In The UK

Handmade In The UK

Supremus loudspeaker cables have a complex geometry and require special machinery to prepare the enameled conductors for termination. Because of this they are handmade at QED’s facility in Woking, UK.

When ordering please specify if you require Rhodium plated locking Airloc Banana Plugs or Spades. Custom lengths can be special ordered please contact us for further details.

QED cable designs are informed by their exhaustive ongoing research into cable parameters which began in 1995 and is detailed variously in the Genesis Reports. These reports set out the design-principles to which they have since adhered and which have resulted most recently in the development of QED Supremus loudspeaker cable, the ultimate expression of sound through science without compromise.

QED Supremus benefits from the appliance of Aircore Technology and therefore boasts very low impedance across the audio band. Cable capacitance and inductance are controlled by the use of low loss dielectrics and the unique constraints of the Aircore geometry.

At just 5 mΩ/m QED Supremus has an extremely low DC loop resistance because it uses 6.16 mm² of cryogenically treated silver plated 99.999% oxygen free copper conductors, the largest cross-sectional area cable ever to be available from QED. This brings the amplifier electrically much closer to the loudspeakers enabling it to exercise better control over them, so that fidelity to the original music signal can be more accurately maintained.


Cryogenic Treatment

Cryogenic Treatment

The improvement in physical properties of copper when cryogenically treated results from the elimination of dislocations in the material’s microstructure. Trumpets and other brass instruments have been found to produce a better tone after Deep Cryogenic Treatment and it is also used to treat guitar and piano strings.

QED Aircore Technology

QED Aircore Technology

Aircore Technology keeps inductance and capacitance at vanishly low levels. This changes the magnetic field within the cable to ensure high frequencies travel through the central part of the conductors. The result is an unrivalled level of high frequency detail and cable timing.

6.2mm² Cross Sectional Area

6.2mm² Cross Sectional Area

Boasting two bundles of 16 Silver plated, cryogenically treated oxygen free copper conductors for ultra-low resistance exerting beautiful control, bringing your amplifier and speaker electrically closer together.

Enamelled Conductor Insulation

Enamelled Conductor Insulation

The conductors are uniquely individually insulated by a nearly invisible layer of enamel. This material was chosen because it has extremely good insulating properties and sets new standards in the insulation hierarchy.

Supremus Locking Airloc Plugs

Supremus Locking Airloc Plugs

A dedicated Rhodium plated, locking design to ensure maximum surface contact between the plug and terminals. Utilising QED’s propriety Airloc technology for an oxygen free, cold weld connection made for life.

  • Tick Cross-Sectional Area : 6.16mm2
  • Tick Wire Gauge : 10AWG
  • Tick Jacket Outside Diameter : 17mm
  • Tick Jacket Internal Diameter : 8mm
  • Tick Loop Resistance : 0.005Ω/m
  • Tick Capacitance : 48pF/m
  • Tick Inductance : 0.49uH/m
  • Tick Dissipation Factor : 0.009
  • Tick Conductors : 2 x 16 solid core silver plated 99.999% oxygen free copper conductors
  • Tick Insulation : Unique enamel with low loss surrounding foamed polyethylene dielectric insulation
  • Tick Banana Plugs & Spades : Choose either Rhodium plated locking Aircore Banana Plugs or Spades
  • Tick Other : Aircore Technology Cryogenically treated

While we do our best to keep this information up to date, please be aware that all specifications are subject to change by the manufacturer at any time.

Options from £860.00 to £1760.00

QED Supremus Loudspeaker Cable Pair 2m

QED Supremus Loudspeaker Cable Pair 2m

QED Supremus Loudspeaker Cable Pair 2.5m

QED Supremus Loudspeaker Cable Pair 2.5m

QED Supremus Loudspeaker Cable Pair 3m

QED Supremus Loudspeaker Cable Pair 3m

QED Supremus Loudspeaker Cable Pair 5m

QED Supremus Loudspeaker Cable Pair 5m


Finance - Pay Monthly

Pay monthly plans for up to 60 months, available on purchases between £299 and £25,000.

0% ONIF6 6 Months
0% ONIF12 12 Months
0% ONIF24 24 Months
0% ONIF36 36 Months
0% ONIF48 48 Months
15.9% ONIB60-15.9 60 Months

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Deposit variable between 10% and 50%, subject to a minimum loan value of £250.


Please note: These finance quotes are for a single purchase of the product listed on this page. Adding additional products or quantities to your order will change these quotes and available terms.

For further information please visit the finance page.


This item is special order and will required additional time to dispatch.

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When in stock:

This item is available for next day delivery, including on weekends.

Delivery is available to most addresses within the United Kingdom. Some services may not be available to all postcodes. More information is available at the basket and on our delivery page.

We do not dispatch orders to addresses outside of the United Kingdom.