QED Supremus Zr Speaker Cable - 3m
✓ Authorised UK Dealer
✓ FREE Next Working Day Courier Service to mainland UK
QED is proud to introduce XT3 power cable, the latest in a new generation of audiophile power cables intended to complement its award-winning range of speaker cables and audio interconnects.


Introducing the Supremus Zr: A New Benchmark in Loudspeaker Cables
Supremus Zr is QED’s next-generation flagship loudspeaker cable, developed with zero compromises. It embodies over five decades of continuous innovation and refinement in audio cable technology. As the pinnacle of QED’s engineering expertise, Supremus Zr sets a new standard for performance, delivering an unparalleled listening experience for audiophiles who demand the very best.
Zirconia: Strength, Precision, and Beauty
One of the standout features of the Supremus Zr is the incorporation of high-quality zirconia plugs and barrels - a first for QED. Zirconia, a premium ceramic material used in luxury watches, fountain pens, and even aerospace applications, is renowned for its exceptional durability, resistance to heat and wear, and immunity to eddy currents. Its sleek, lustrous finish also brings a premium aesthetic to the cable, reinforcing its status as a true luxury component.




Advanced Engineering for Pure, Uncompromised Sound
Supremus Zr seamlessly integrates QED’s proprietary Aircore™ and Airloc™ technologies along with a suite of advanced design features. This synergy of innovation ensures the most accurate preservation of the analogue music signal from source to speaker. With the Supremus Zr, QED has created its most effective cable yet — one that maintains signal integrity and musical fidelity like never before.


"...the Supremus Zr is an excellent performer at the price and can compete against the very best. Its neutral balance also means that it should be suitable for use in a very wide range of systems. I highly recommend you give it a try."


"Adding these cables to a quality HiFi chain is tantamount to a component upgrade. For those with a good quality HiFi system, the QED Supremus Zr cables will actually corral it into shape."
| Features | Cross-sectional area: 6.20 mm2 Wire gauge: 10 AWG Outside diameter: 17 mm Loop resistance: 0.005 Ω/m Parallel capacitance: 48 pF/m Loop inductance: 0.49 μH/m Dissipation factor: 0.009 Technology: QED Aircore™; cryogenically treated; QED Airloc™ Conductors: 32 solid core, silver-plated, 99.999% oxygen-free, polyester coated copper Dielectric: Foamed polyethylene, LDPE, and air Plugs: Rhodium-plated, locking Airloc plugs with zirconia barrels |
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How will you send my item?
We ship to addresses within the UK using Royal Mail and DPD couriers.
How much does delivery cost?
Standard 2-3 working day delivery is FREE on all orders to mainland UK. Next working day courier service is available on all orders for a small fee of £4.99. On some items this is provided for FREE.
For orders to UK Non-mainland and International destinations, there will be an additional charge at checkout. Please see below for more information.
How long does delivery take?
Depending on the delivery service you choose, delivery usually takes between 1-3 working days to mainland UK from the moment we despatch your order. Orders to UK non-mainland and international destinations can take longer.
When will you despatch my order?
Orders placed before 3pm are processed and despatched the same day (excluding bank holidays and weekends). Orders placed on weekends will be processed and despatched the following working day.
*Please note that international orders may require extra checks before we are able to despatch your order so timescales may vary.
Can I track my delivery?
Yes - Order tracking is offered as standard on all items, whether they are shipped via DPD or Royal Mail. You will receive your tracking information via email once we have despatched your order.
UK Non-mainland and International destinations.
Due to the UK leaving the EU, some of our delivery partners have changed the way we ship to international and offshore destinations. This means that for the time being we are unable to ship items to these locations.
We are still accepting orders to these destinations however delivery times and prices are not final. We will confirm via email once we know more from our delivery partner.
Shipping for all items to UK Non-Mainland and International destinations will incur a charge at checkout. This charge is not final and we may need to charge for additional postage if required.
Shipping to international destinations may require further security checks and I.D. may need to be provided by the cardholder. We reserve the right to cancel any orders where you are do not pass our security checks or do not pay for appropriate postage.
Please note that we are unable to ship some items outside the UK. To avoid any disapointment please contact us before making your order.
What do you class as UK Non-mainland?
Rep. Ireland, N. Ireland, Channel Islands, Jersey, Guernsey, Isle of Wight, Isle of Man and Scottish Highlands. If you are unsure whether your address is classed as UK Non-mainland please feel free to contact us and an advisor will be happy to help.
For any further enquiries with regards to your delivery please contact us on 020 8813 7666 and one of our adviser's will be happy to help.
If you're not happy with your item or you've changed your mind.
Even though we're sure you'll be happy with your purchase, it's important that you are aware of how we deal with returns in the event that you need to send something back.
We understand how inconvenient it can be when you buy a product and aren't 100% satisfied with it. For this reason we have designed our returns policy to prevent any further inconvenience to you in these instances.
Under 30 days
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You can return your goods for a full refund or exchange as long as you inform us of your intention to return the goods within 30 days of receipt, starting from the day after you receive your goods (Exclusions apply, see below.)
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All return costs are down to the buyer and it is recommended that you return your items using a trackable method with appropriate insurance (if required).
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Once we have confirmed your return, please ensure that you return the item within 14 days.
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If a returns number is provided then please ensure that the parcel has this clearly marked.
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Items need to be returned in "as new" condition in their original packaging. We don't mind if you open the product to check it, however any used or damaged products will be subject to a 25% handling fee so please take care when opening your items.
After 30 days
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We will not offer a refund after 30 days of you receiving your delivery unless your product is faulty.
Exclusions from our returns policy
As we're sure you'll understand, there are some products that we can't offer returns on due to their nature. These include:
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Special order items and cables cut from a reel (priced per metre). These items will be clearly identifiable.
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In-Ear headphones due to health and hygiene reasons.
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Products that include software which require activation.
Please note that these exclusions do not apply to items that become faulty.
If your product becomes faulty
We endeavour to get your items to you in fully working order, however in the event that your items do become faulty, please read below on what you should do next.
In a lot of cases with some products, faults can be fixed by performing some basic troubleshooting, so to prevent any further inconvenience to you we advise that you contact our Customer Service team who can guide you through some basic troubleshooting before sending items back.
Under 30 days
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If your items become faulty within 30 days of delivery you are entitled to a full refund or exchange. Please contact our customer service centre who will provide necessary returns details.
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Please send the items back with a cover note including a description of the fault and your original order number.
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Once we have fully tested the item and confirmed the fault, we will process the refund or exchange including cost of carriage back to us (within reason).
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If during our testing we cannot find a fault, no refund will be given and you will be charged for delivery of the item back to you.
After 30 days
- After 30 days you will still be able to get your faulty items repaired or replaced within the manufacturers warranty and we will be happy to assist you with this. Please contact our customer service team to find out the best way to get your items repaired or replaced. Please be aware that after 30 days we will not cover you for any carriage costs.
