Supra Classic 4.0 2X Speaker Cable - Custom Length

Item code: 1000000107

5 1 reviews ✓ Verified
The Supra Classic 2×4.0 mm² cable delivers powerful, clear sound for bi-wired or high-power Hi-Fi systems. Made with tin-plated 5N oxygen-free copper, it ensures reduced signal loss and long-term durability. Ideal for audiophiles seeking high-quality…
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£6.25
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Cable Length *

Select the desired length for your cable from the drop-down menu.

More Options (63)

Termination *

If you want Future Shop to terminate your speaker cable with our special range of plugs, select Banana/BFA/Z-Plug or Spade plugs from the drop-down menu. We offer a wide range of options on how our highly trained and experienced engineers can fit the plugs to your selected cable. If an option is not available for your requirements, please call us on 0800 772 3688 or 0208 905 1555. All cables are tested for signal integrity before shipping.

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Different connectors at each end are fine — call us if unsure

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£6.25 Ex. VAT
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SPEAKER CABLES:

A quantity of 2 means you will receive a pair of speaker cables e.g. for your front left and front right speakers. By entering a quantity of 1, you will get a cable for a single speaker e.g. centre speaker and this option also enables you to vary the length (and termination) of your cable for each speaker.

OTHER CABLES:

A quantity of 1 means you will receive a single cable in the case of aerial, satellite, subwoofer, digital coaxial & optical cables and a pair of cables in the case of 2 rca to 2 rca analogue audio cables.

NON-CABLE PRODUCTS:

A quantity of 1 means you will receive 1 of the specified products.

£6.25 ex. VAT
Available — built to order, dispatches in 7 - 10 Days
Delivery: Royal Mail Tracked 24 FREE  ·  DPD Next Day from £8.95  ·  DPD Saturday from £12.95
Order before 4pm (Mon–Fri) for same-day dispatch
Our promise: 60-day returns · Free burn-in · Built in our UK workshop · Lifetime warranty · Expert support on every order

Supra Classic 4.0 2X Speaker Cable - Custom Length

 

The Supra Classic 2×4.0 mm² cable is a high-performance solution designed for powerful Hi-Fi systems requiring dynamic, accurate sound. Ideal for intermediate-length runs, bass wiring, and bi-wired or bi-amplified setups, this cable supports consistent signal transmission even under heavy loads. Featuring tin-plated, multi-strand 5N oxygen-free copper, it reduces corrosion and minimizes the skin effect, ensuring a smoother flow of current with minimal signal loss or timing distortion. Supra’s Classic Series has long set the benchmark in audio connectivity.

The durable yet flexible PVC insulation not only safeguards the cable but also stabilizes the tin-plated surface, preserving its sonic integrity over time. For environments with strict safety requirements, the Classic/H FRHF variant offers a flame-retardant, halogen-free alternative. Whether you're upgrading from standard Hi-Fi cables or building a system that demands clarity and precision, the Supra Classic 2×4.0 mm² delivers audio performance that enhances every note. Its engineering strikes a balance between robustness and flexibility, making it easy to install without compromising signal quality. Available in multiple sizes to suit various applications, this cable is a reliable choice for discerning audio enthusiasts looking to unlock the full potential of their system.

 

Classic Series – The Original Standard in High-Performance Audio Cables

With flexible, tin-plated, multi-strand oxygen-free 5N copper, the Supra Classic Series ensures outstanding sound integrity and durability. The tin plating provides crucial corrosion resistance and minimizes the skin effect, allowing for uninterrupted current flow without the disruptive “jumps” between strands that can introduce timing errors. The result is a clear, precise audio signal that maintains fidelity even under high power. Supra’s chemically stable PVC insulation enhances the tin-plated surface over time, preserving the cable’s sonically rich qualities for years. The Classic Series is also available in a flame-retardant, halogen-free version (Classic/H FRHF), making it ideal for professional and safety-conscious installations. An excellent choice for entry-level audiophiles, the Supra Classic Series offers a noticeable improvement over standard Hi-Fi kit cables, delivering clarity and depth that elevate any listening experience. Available in multiple dimensions, the Supra Classic 2×4.0 mm² is engineered for those who seek both power and precision in their audio setup.

 

Elite Reference Series Plugs: Next-Level Audio Connectivity

The Elite Reference AirTite plugs offer significant advantages over traditional screw-based speaker cable plugs. Unlike screw designs, which may loosen over time and potentially impact the connection and sound quality, the Elite Reference plugs use a cold-weld method to create a secure and reliable bond between the cable and the plug. This helps maintain consistent performance and minimises signal loss, supporting clear and high-quality audio. With a ferrule-free design for direct signal transfer, beryllium copper cores, and 24K gold plating, they are engineered for enhanced conductivity and long-lasting durability. The addition of protective metal barrels further reinforces their professional-grade construction, making them an excellent choice for those who value dependable audio connections.

The Elite Reference plugs are engineered with additional advantages that make them stand out:

  1. AirTite Ferrule-Free Design - Unlike traditional plugs that use ferrules, the Elite Reference plugs opt for direct conductor-to-plug contact, removing any potential barriers to signal transfer. Featuring four different inlet sizes, these plugs are perfectly tailored to fit various cable gauges with a cold-weld, air-tight design, that eliminates soldering, reduces resistance, prevents oxidation, and enhances durability.
  2. Beryllium Copper Core with 24K Gold Plating - The banana plugs feature a beryllium copper core, known for its exceptional mechanical strength and conductivity. This material resists corrosion and retains its shape, maintaining a tight and reliable connection over time. The 24K gold plating ensures a smooth, high-quality signal path while adding durability for years of consistent performance.
  3. Dual Functionality - Designed as BFA and banana plug compatible the Elite Reference banana plugs provide greater versatility, making them suitable for a broader range of speaker terminals. This added functionality ensures compatibility with high-end Hi-Fi setups and equipment.
  4. Silver Core Spade Plugs with Metal Barrel Protection - The spade plugs in the Elite Reference Series incorporate a silver base plated with 24K gold, offering superior conductivity compared to many alternatives. Unlike other spade plugs, the Elite Reference spades also include a durable metal outer barrel, providing additional protection and a premium finish.
  5. The Elite Reference plugs are manufactured in Taiwan, a region renowned for its precision engineering and high-quality manufacturing standards. This ensures that every plug is built to exact specifications, offering exceptional consistency, reliability, and performance.

Specifications

  • Weight: 11 kg
  • Brand: SUPRA
  • Product Type: Speaker Cable LSHF
  • Cable Length: 100M
  • Cross-Sectional Area: 2×4.0mm2 / AWG 11
  • Color: Ice Blue
  • Package: 100M, 1PC
  • Wire: 2x511x0.10mm TPC
  • Wire Material: Tin Plated OFC
  • Jacket material: Heat & Ageing Resistant PVC
  • Weight: 108 g/m
  • Resistance: 4.3 Ohm/km
  • Good-Better-Best: Good
  • Inductance: 0.55 uH/m
  • Number of Channels:1 Channel Mono
  • Flexibility: High Flex
  • Power Rating: 100V

 

About Supra Cables

Supra Cables, a prominent audio and visual transmission technology brand, is globally recognised for its unwavering commitment to quality, innovation, and superior performance. Founded in Sweden in 1976 by Tommy Jenving, the company has positioned itself as a frontrunner in the industry, setting unparalleled standards for high-end audio and video cabling.

From the beginning, Supra Cables has strived to deliver its customers the best possible sound and image reproduction. Their products embody this dedication, from their highly-regarded HDMI cables, which provide impeccable video and audio quality, to their speaker cables and connectors, each engineered for precision and performance.

What sets Supra Cables apart from many brands in the industry is their insistence on quality over cost. Each product is designed and manufactured in-house in Sweden, ensuring total control over production. The company does not compromise on materials, utilising only the finest quality metals, plastics, and insulating materials, thus resulting in products that guarantee superior audiovisual experiences.

Supra Cables' products are not merely 'assembled'; they are manufactured carefully, distinguishing the brand in the crowded market. The result is a portfolio of cables and connectors that promise exceptional performance and durability, consistently delivering top-tier sound and image quality that audiophiles and visual enthusiasts worldwide have come to trust and appreciate.

A unique selling point of Supra Cables is their pursuit of environmental sustainability. Recognising its responsibility to the planet, the company has committed to creating products that are as eco-friendly as possible without compromising on quality or performance. This eco-consciousness extends to their packaging, intentionally designed to minimise environmental impact.

In the realm of audio and visual transmission technology, Supra Cables continues to lead, pushing the boundaries of innovation, reliability, and performance. Their steadfast dedication to quality, backed by over four decades of experience, ensures they remain a trusted name in the industry, delivering audiovisual experiences that stand out in clarity, richness, and precision. With Supra Cables, customers are assured of products that perform remarkably and contribute to our planet's health.

 

Specifications

  • Weight: 11 kg
  • Brand: SUPRA
  • Product Type: Speaker Cable LSHF
  • Cable Length: 100M
  • Cross-Sectional Area: 2×4.0mm2 / AWG 11
  • Color: Ice Blue
  • Package: 100M, 1PC
  • Wire: 2x511x0.10mm TPC
  • Wire Material: Tin Plated OFC
  • Jacket material: Heat & Ageing Resistant PVC
  • Weight: 108 g/m
  • Resistance: 4.3 Ohm/km
  • Good-Better-Best: Good
  • Inductance: 0.55 uH/m
  • Number of Channels:1 Channel Mono
  • Flexibility: High Flex
  • Power Rating: 100V

We use Royal Mail 1st Class services for our Standard Delivery.

Orders received before 4.30 pm Monday to Friday are usually dispatched the same day by FIRST CLASS post (unless premium postal or timed courier services are selected), subject to stock availability. This does not apply to custom-length cables and speaker cables as these require a longer timescale to terminate. This also excludes all cables selected for the burn-in service. Please note, we do not process orders on national holidays in the UK. Over 98% of our orders are delivered the next working day including Saturdays.

Standard delivery is usually within 2 working days, although 98% of all orders are delivered the next working day including Saturdays. In extreme cases, such as delivery to the Highlands and Islands, this may take 3 days.

All items are fully insured and come with an invoice from Future Shop. We use the Royal Mail for delivery of small packages and DPD Local or DHL for items that weigh over 2KG. Items over 2KG are fully insured and will usually be delivered within 48 hours of placing your order subject to stock availability. For international orders, we use FedEx or DHL services where customers have selected this option.

 

 

Please note, special orders for non-standard cable lengths may be subject to longer deliver time-scales. This may vary from manufacturer to manufacturer.

 

We offer 'Free delivery on orders over £99' subject to the following terms & conditions:

  • Applies only to orders with £99 or more of items (including VAT at the UK rate), at Future Shop
  • Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK (excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL).
  • Applies only to deliveries to addresses within mainland UK and Northern Ireland addresses. Applies only to orders that are to be delivered to a single Mainland UK delivery address.
  • You will not be eligible for free delivery on your order if any items are cancelled or returned for a refund, bringing the total order amount below £99. Where items are returned, the refund due will be the cost of the item less any postage costs.
  • We reserve the right to change or discontinue 'Free delivery on orders over £99 promotion at any time.
  • FREE DELIVERY FOR ORDERS OVER £99 OFFER DOES NOT APPLY TO TRADE CUSTOMERS.

UK Postal & Delivery Charges - FIRST CLASS

Free UK delivery on all orders over £99*

Weight Price (FIRST CLASS UK POSTAGE)
0000g – 1000g £ 3.95
1000g – 1400g £ 4.95
1400g – 1800g £ 5.95
1800g – 2000g £ 6.95
2000g – 3000g £ 8.95

* Free Delivery on orders over £99 utilises Royal Mail First Class postal service for items weighing under 2KG. For items weighing over 2KG, we use DPD or DHL next working day services which deliver from 9.00am to 6pm within mainland UK.

Free Delivery for orders over £99 excludes Royal Mail Special Delivery Services and timed next day delivery services by DPD or DHL.

 

Special Delivery UK - Guaranteed Next Working Day

We have 99.9% of the UK covered With Royal Mail Next Day Special Delivery. We guarantee delivery to most UK addresses by 1pm the next working day. This includes Northern Ireland, Jersey and Guernsey. Some places take longer to deliver to but we still guarantee delivery within three working days by 5.30 PM.

For the Next Day Special Delivery service, orders must be received by Future Shop by 4.30pm weekdays. Orders after the 4.30pm deadline cannot be guaranteed for same day dispatch.

Please note, Royal Mail Special Delivery for next working day may not be possible where non-standard cable lengths are ordered. If this is the case, the item will be shipped via The Royal Mail Special Delivery service as soon as the cable is custom made.

For orders weighing over 2KG, we reserve the right to ship items using Next Day Pre-Noon Courier Services where Royal Mail Special Delivery option has been selected.

 

Channel Islands & Northern Ireland

We accept orders from all Channel Islands including Alderney, Jersey, Guernsey and Sark. Unless you select a premium service, Items weighing under 2KG are delivered using our standard UK delivery option above. For items weighing over 2KG, a surcharge may be applied for all deliveries to the Channel Islands as well as Northern Ireland.

 

European Countries

Deliveries to EU member states are not subject to 20% VAT after December 31st 2020 and therefore the 20% VAT on items is automatically deducted when you log-in, register or proceed to place an order.

The customer will be liable for the VAT at the local VAT rate, duty on the import and the brokerage service fee if applicable. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.

We offer the following shipping services:

  • Royal Mail First Class International Airmail Services - Items are usually delivered within 3 to 5 working days.
  • Royal Mail Standard International Mail Services - Items are usually delivered within 7-10 working days.
  • DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
  • Federal Express International Priority - Items are usually delivered within 24 to 48 hours. FedEx orders must be received by 3.00pm for next day service to most destinations in Europe.
  • Federal Express International Economy - Item are usually delivered within 48 to 72 hours.

We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.

 

Worldwide - Excluding UK & Europe

Deliveries outside of the UK are not subject to 20% VAT and so the 20% tax on items is automatically deducted when you log-in, register or proceed to place an order.

If applicable, the customer will be liable for the taxes at the local tax rate, duty on the import and the brokerage service fee. This may need to be paid in advance to your local Customs & Excise office or the delivery company before your order can be delivered.

We offer the following shipping services:

  • Royal Mail First Class International Airmail Services - Items are usually delivered within 7 to 10 working days.
  • Royal Mail Standard International Mail Services - Items are usually delivered within 15 working days.
  • DHL Express International - Items are usually delivered within 24 to 48 hours. DHL orders must be received by 3:30pm for next day service to most destinations in Europe
  • Federal Express International Priority - Items are usually delivered within 48 hours. FedEx orders must be received by 3.00pm in order to ship items the same day, subject to stock availability.

  • Where the actual weight of the package significantly exceeds the shipping cost charged on orders, we may write to you for an additional shipping charge. For larger orders, items may be shipped in multiple packets at our discretion.

We reserve the right to change your shipping method without notification if you select a method that we cannot use for your shipment (for instance, we cannot ship via postal services for items over 2 Kg to International destinations). If we need to change your shipping method, we will choose the least expensive shipping method for your order.

Write Your Own Review

Supra Classic 4.0 2X Speaker Cable - Custom Length

We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.

Please do:

  • - Write 50-300 words for the product
  • - Comment on the products value and effectiveness
  • - Tell us if you like the product, but most importantly explain why you like or dislike it
  • - Mention related products and how this one rates by comparison
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Ian Thornicroft ✓ Verified Purchase
High qulaity cable and very good value. 18 August 2025
After doing a fair bit of research, I decided to buy the Supra Classic 4.0 cable as my existing cables were too short for my loudspeaker position. The Supra seems to have been around for a fairly long time and has a generally good reputation. It was noted for being flexible and easy to handle, which was an important consideration. Opinions vary about the ice blue colour, but I've found it very attractive in use, and while not exactly blending in with the room colour scheme, it doesn't really stick out too badly either.

My research led me to believe the cable was not very fussy regarding partnering equipment, and quite neutral in presentation—on a par with cables like those from Van Damme, which I've used in the past (very blue!) and Mogami, which I've not been able to hear. The Supra cable strikes me as very even-handed across the frequency range. It gives a full, but not over-rich presentation, with plenty of top end detail but not at the expense of body. The sound is more open and involving than the QED Silver Anniversary which the Supra is replacing. The Supra makes things a little fuller and is more revealing and dynamic. I was also able to compare it briefly to DNM Resolution I use in a second system, and this was leaner than the Supra—very detailed but perhaps not quite so realistic.

I listen mainly to acoustic music of various sorts and the Supra cable sounds pleasingly natural. I'm using it with Spendor Classic 4/5 speakers and Quad amplification, but I tried it briefly with a Sugden ANV50 amplifier and Harbeth M30.1 speakers, where it gave a very good account of itself. A high quality cable, it was supplied with nice banana plugs, too.

I would certainly recommend it.

Frequently Asked Questions

Start by considering your amplifier and speakers. For short runs or compact systems, basic oxygen-free copper cables may suffice. But if you're after tighter bass, better detail or a wider soundstage, an upgrade to a higher-quality cable, like those from Chord Company, AudioQuest or Atlas, can make a noticeable difference. For personalised recommendations, speak to our consultants here.
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Yes. Bi-wire cables separate the signal paths for high and low frequencies, which can improve control and reduce interference in compatible speakers. Single-wire cables are suitable for most systems, but bi-wire setups can offer sonic gains if your speakers and amp support them. Alternatively, you can use single-wire cables with matching jumper cables on bi-wirable speakers.
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Higher-end cables often use better conductors, insulation materials, and terminations, which can reduce signal loss and interference. Whether it's worth the investment depends on your system's resolution and your listening environment. Our team can help you choose based on your priorities.
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Yes, cable length can influence performance. Longer runs can introduce resistance and signal loss, especially with thinner cables. Where possible, try to keep left and right channel lengths similar, and choose an appropriate gauge for the distance.
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Jumper cables replace the metal links between binding posts on bi-wireable speakers. Stock jumpers can limit performance, while high-quality alternatives preserve signal integrity and improve coherence across frequencies. When replacing your manufacturer supplied links, we recommend to use jumper cables of equal or better quality than your speaker cable.
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All cables matter, and your system will require good quality cables for all of it's connections, however, if you were looking for the cable which will make the biggest difference, then we would recommend looking at the power cables from your wall socket, to your distribution block and/or amplifier. More often than not, we hear from customers, manufacturers, and our own tests that higher quality power cables can have a significant impact of the quality of your system.
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This entirely depends on your current system and your expectations. You could have a decent pair of speakers which are not matched correctly with your amplifier, or vice versa. Similarly, you may want a new source of media to listen to. There are also options to upgrade other aspects of your system, such as the power, isolation or cabling to get the most out of your system before upgrading the traditional components. The best way to find out your own upgrade path is to contact our consultants and we would be happy to help you.
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In short, yes, although, this depends on the quality of the cable and your speakers/amplifier. High quality speaker cables tend to be manufactured with 4 key areas, their conductor, dielectric, shielding and geometry. Each of these areas can optimise signal retention from your amplifier to your speakers. Cheaper speaker cables can use lower quality conductors (tin-plated copper or even steel-clad copper), with basic dielectrics (PVC), no shielding and minimal strands with no geometry. More expensive speaker cables start to introduce higher quality conductors (Oxygen-free Copper, Ohno Continuous Cast Copper, Silver-plated Copper or even Pure Silver), better dielectrics (XLPE, PTFE, Teflon etc.), different amounts of shielding (foil, ofc-braid, carbon etc) and various geometries (solid-core, different twists, higher gauges etc.). There are diminishing returns to consider between your speaker cable and your system, as well as the potential of bottle-necks in your system if you use a lower...
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Write Your Own Review

Supra Classic 4.0 2X Speaker Cable - Custom Length

We are interested in your opinion of this product. let us and other customers know how you feel by filling in the comment field below. Your review will appear in this section within 3 working days.

Please do:

  • - Write 50-300 words for the product
  • - Comment on the products value and effectiveness
  • - Tell us if you like the product, but most importantly explain why you like or dislike it
  • - Mention related products and how this one rates by comparison
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