Fuses

13A plug fuses and equipment fuses from HiFi Tuning, QSA and Synergistic Research, in the ratings and sizes hi-fi equipment actually uses.

42 products Award Winning Dealer Since 2013 Free expert consultation

An honest word on hi-fi fuses

Fuses are the most contested product category we sell. A fuse is a safety device, its job is to fail, and the argument that the material and construction of a few millimetres of wire affects the sound of a system is one many people reject on principle. We understand why.

What we can tell you is what we hear and what our customers report. A number of listeners describe a lower noise floor and better resolution after changing a mains fuse, and repeat purchasing in this category is high. Others try one and hear nothing at all. We would not put a fuse near the top of an upgrade list ahead of cables, isolation or a decent mains block, and we will say so if you ask.

Two rules apply regardless of where you stand on the question. Never fit a higher rating than the equipment specifies, because the fuse is there to protect you and the equipment. And check the physical size, since 20mm and 32mm equipment fuses are not interchangeable. If you want to try one, start with a single fuse rather than changing several at once, so you can hear what each change does.

4.95/5 from 20,578+ reviews Award Winning Dealer Since 2013 UK Specialist since 2005

12 of 42 products

  • QSA

    Quantum Science Audio (QSA) Black Entry Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Black UK

    (11 reviews)
    From
    £41.67
    Ex. VAT
    Future Shop proudly introduces Quantum Science Audio (QSA), a leader in audiophile fuses with over 22 years of research in 'Bottle Neck Distortion'. QSA's advanced fuses significantly enhance audio system performance, a breakthrough in an industry that once overlooked the importance of fuses. Recognising that all power in audio systems passes through a fuse, QSA's designs aim to reduce 'bottlenecking' effects, unlocking a system's full potential. The BLACK fuse, the range's starting point, focuses on improving audio clarity and reducing noise at an accessible price.
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  • QSA

    Quantum Science Audio (QSA) Light-Blue Entry Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Light Blue UK

    (30 reviews)
    From
    £71.67
    Ex. VAT
    Future Shop introduces Quantum Science Audio (QSA), a leader in audiophile fuses with over two decades of research in 'Bottle Neck Distortion'. QSA's innovative fuses, previously overlooked in the industry, can significantly enhance audio systems. They focus on reducing 'bottlenecking' effects, thus maximising system performance. Our listening tests and feedback confirm that QSA fuses, across the range, notably improve systems, comparable to higher-priced components. The LIGHT BLUE Entry Level fuse, with added graphene elements, offers enhanced performance and sound dynamics, making it ideal for those advancing in high-fidelity audio.
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  • QSA

    Quantum Science Audio (QSA) Yellow Entry Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Yellow UK

    (44 reviews)
    From
    £166.67
    Ex. VAT
    Future Shop proudly presents Quantum Science Audio (QSA), pioneers in the audiophile fuse industry with over 22 years of expertise in combating 'Bottle Neck Distortion'. QSA's fuses, once overlooked, now play a crucial role in enhancing audio system performance. They effectively tackle 'bottlenecking' issues, significantly improving system output. Our evaluations, supported by external feedback, affirm that QSA fuses remarkably upgrade audio systems across their range. The YELLOW fuse, with advanced material treatments, offers refined audio performance, delivering clearer, detailed sound for systems balancing quality and value.
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  • QSA

    Quantum Science Audio (QSA) Violet Mid-Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Violet UK

    (9 reviews)
    From
    £516.67
    Ex. VAT
    Future Shop introduces Quantum Science Audio (QSA), leaders in audiophile fuses with over two decades of expertise in 'Bottle Neck Distortion'. Revolutionising audio systems, QSA fuses significantly reduce 'bottlenecking', enhancing system performance. Our extensive listening tests confirm that QSA fuses provide substantial upgrades, comparable to more expensive components. The VIOLET Mid-Level fuse, with its comprehensive Quantum treatments, is designed for audiophiles desiring marked improvements in sound depth and fidelity, offering a significant step up from entry-level options.
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  • QSA

    Quantum Science Audio (QSA) Orange High-Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Orange UK

    (1 reviews)
    From
    £833.33
    Ex. VAT
    Future Shop proudly presents Quantum Science Audio (QSA), a leader in the realm of audiophile fuses with over 22 years of research in reducing 'Bottle Neck Distortion'. QSA's advanced fuses, once underestimated, now prove to be key in elevating your audio system's performance. They are designed to mitigate 'bottlenecking' effects, potentially maximising your system's capabilities. While it might seem surprising, our listening tests and external feedback confirm that QSA fuses across their range significantly upgrade audio systems, rivalling higher-priced components. The ORANGE High-Level fuse, surpassing the VIOLET Mid-Level, is tailored for sophisticated audio setups. It incorporates advanced graphene and superior metal treatments, aiming to produce richer and more detailed soundscapes.
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  • QSA

    Quantum Science Audio (QSA) Red High-Level UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Red UK

    (4 reviews)
    From
    £1,166.67
    Ex. VAT
    Future Shop excitedly unveils Quantum Science Audio (QSA), experts in audiophile fuses with over 22 years of research in 'Bottle Neck Distortion'. QSA's advanced fuses significantly enhance audio systems, a vital component often overlooked in the industry. Their fuses, designed to mitigate 'bottlenecking', can dramatically improve system performance. Our listening tests and customer feedback affirm that QSA fuses substantially upgrade audio systems across their range. The RED Hi-End fuse, specifically crafted for high-voltage, high-end systems, focuses on delivering refined, pristine audio with reduced distortion, rivalling the performance of much pricier components.
    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Red-Black High-End UK Mains Fuse - 3A, 5A & 13 Amp

    SKU: QSA Red-Black UK

    (1 reviews)
    From
    £2,000.00
    Ex. VAT
    Future Shop is excited to feature Quantum Science Audio (QSA), a distinguished name in the audiophile fuse market. With a focus on innovative research into 'Bottle Neck Distortion' over the past two decades, QSA has developed fuses designed to optimise your audio system's performance. This approach aims to address 'bottlenecking' effects, potentially enhancing the functionality of the system. The BLACK and RED Hi-End fuse, which combines the qualities of both, is specifically developed for those seeking an upgrade in sound clarity and dynamic range in high-end audio setups.
    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Black Entry Level Slow-Blow Fuse

    SKU: QSA Black Slow

    (1 reviews)
    From
    £41.67
    Ex. VAT
    Future Shop proudly introduces Quantum Science Audio (QSA), a leader in audiophile fuses with over 22 years of research in 'Bottle Neck Distortion'. QSA's advanced fuses significantly enhance audio system performance, a breakthrough in an industry that once overlooked the importance of fuses. Recognising that all power in audio systems passes through a fuse, QSA's designs aim to reduce 'bottlenecking' effects, unlocking a system's full potential. The BLACK fuse, the range's starting point, focuses on improving audio clarity and reducing noise at an accessible price.
    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Light-Blue Entry Level Slow-Blow Fuse

    SKU: QSA Light Blue Slow

    (8 reviews)
    From
    £71.67
    Ex. VAT

    Future Shop are very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can enhance your enjoyment of your system in a way that is remarkable for such a small component, until recently considered irrelevant by many in the industry. The Light Blue fuse is a significant step up from QSA's entry level Black fuse, and still outperforms fuses from other brands at a higher price.

    Please note: we cannot guarantee that all fuse ratings will be in stock, so longer lead times may apply.

    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Yellow Entry Level Slow-Blow Fuse

    SKU: QSA Yellow Slow

    (10 reviews)
    From
    £166.67
    Ex. VAT

    Future Shop are very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can enhance your enjoyment of your system in a way that is remarkable for such a small component, until recently considered irrelevant by many in the industry. The Yellow fuse is another significant step up from QSA's Light Blue fuse. It may be entry-level by QSA's standards, but it will still outperform fuses from any other brands at higher prices.

    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Violet Mid-Level Slow-Blow Fuse

    SKU: QSA Violet Slow

    (2 reviews)
    From
    £516.67
    Ex. VAT

    Future Shop are very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can enhance your enjoyment of your system in a way that is remarkable for such a small component, until recently considered irrelevant by many in the industry. The Violet fuse is the largest step up in the QSA range so far. Moving out of their entry-level fuses, when it was released this quickly became recognised as the most remarkable audiophile fuse in production.

    View Available Worldwide Shipping Available
  • QSA

    Quantum Science Audio (QSA) Orange High-Level Slow-Blow Fuse

    SKU: QSA Orange Slow

    From
    £833.33
    Ex. VAT

    Future Shop are very excited to introduce Quantum Science Audio, the undisputed heavyweights in the audiophile fuse space. With more than 22 years of research into what they call 'Bottle Neck Distortion', QSA products can enhance your enjoyment of your system in a way that is remarkable for such a small component, until recently considered irrelevant by many in the industry. The Orange fuse makes another considerable leap from the Violet. Approaching the high-end range, it delivers remarkable performance even at its price.

     

    View Available Worldwide Shipping Available

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The Master Fuse is Synergistic Research’s most advanced design, engineered for maximum resolution, dynamics, and soundstage depth. The Purple Fuse, while more affordable, offers excellent performance and long-lasting reliability. Both elevate your system, but the Master Fuse sets the highest benchmark in the range.

Yes. Synergistic Research fuses (including the Master, Purple, Pink, Orange, and Blue) are directional. For best results, install them so electricity flows left to right when viewing the fuse label. Many listeners report subtle sonic differences when reversed, especially after the fuse has been broken in.

Yes. For example, Synergistic Research Black fuses typically require around 200 hours of break-in, with about 90% of tonal change settling after 100 hours. Patience is rewarded, as long-term listening reveals deeper improvements in tonal balance, staging, and overall clarity.

Hi-fi fuses are safe to use when they are the correct rating and type specified by the manufacturer. They function in the same protective way as standard fuses, but can use different materials, construction methods and optimisations.

Some listeners report improvements in clarity, focus, and low-level detail after fitting a hi-fi fuse. These changes are typically subtle and system-dependent, making fuses more of a fine-tuning option than a primary upgrade.

We have tried and tested various different fuses from multiple 3rd party manufacturers, as well as the standard off the shelf fuses, and we believe that audiophile fuses do offer improvements while maintaining safety standards. Like any fuse, audiophile fuses will still blow above their rated amperage to protect your power connections & equipment. We understand that it seems counter-intuitive for a fuse to make improvements, however, we, along with many other audiophiles, have found that there are improvements to be found when swapping out an off the shelf fuse for an audiophile fuse. We highly recommend trialing an audiophile fuse in your system to hear the difference yourself.

Many users report improvements in clarity, dynamics, and noise floor when using high‑quality audio fuses.

They are usually fitted in Uk 3 Pin plugs, IEC inlets, or internal fuse holders within audio equipment.

Some manufacturers recommend a short running‑in period for best performance.

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