Fuses

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

43 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 20,703+ reviews Award Winning Dealer Since 2013 UK Specialist since 2005

24 of 43 products

  • QSA

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

    SKU: QSA Black Fast Blow

    From
    £41.67
    Ex. VAT
    Quantum Science Audio's Organic-Blue Jitters aim to deliver a balanced, sophisticated audio experience, with improved clarity and a precise sound profile. Enhanced by QSA's unique quantum techniques, Lan Jitters for streaming networks offer improved phase detail, clarity, and natural sound across all levels. These innovations contribute to a clearer, more immersive listening experience, closer to the artist's original intention.
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  • QSA

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

    SKU: QSA Light-Blue Fast-Blow

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

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  • QSA

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

    SKU: QSA Yellow Fast-Blow

    (3 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.

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  • QSA

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

    SKU: QSA Violet Fast-Blow

    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.

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  • QSA

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

    SKU: QSA Orange Fast-Blow

    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.

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  • QSA

    Quantum Science Audio (QSA) Red High-Level Fast-Blow Fuse

    SKU: QSA Red Fast-Blow

    From
    £1,166.67
    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 Red fuse is a step change from the Orange. At the beginning of the high-end range, we believe that it can deliver upgrades to your sound that can match far more expensive cables and equipment.

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  • Synergistic Research Red High-End Fast-Blow Fuse
    SALE

    Synergistic Research

    Synergistic Research Red High-End Fast-Blow Fuse - Special Offer - Black November Deal

    SKU: SR Red Fast-Blow

    From
    £41.62 £58.32
    Ex. VAT ✓ Save £16.70

    Synergistic Research Red Fuses employ a specially developed burn wire selected in blind listening tests for its ability to improve sound. Next they treat the fuse with a proprietary conditioning process followed by 1,000,000 volts of electricity in a process they call Quantum Tunneling that affects how electricity travels along the fuse for an unmistakable improvement in sound quality.

     

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  • From
    £3,500.00
    Ex. VAT
    Future Shop proudly presents Quantum Science Audio (QSA), a leader in the audiophile fuse industry with extensive research in 'Bottle Neck Distortion'. QSA fuses are designed to enhance audio systems, a crucial component historically overlooked. These fuses focus on reducing 'bottlenecking', thus optimising system performance. Our tests and feedback affirm that QSA fuses across their range substantially improve audio systems. The SILVER Extreme fuse, designed for ultra-high-fidelity audio, integrates advanced graphene ring technology and Quantum treatment, aiming to elevate sound quality in the most sophisticated and demanding audio setups.
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  • Synergistic Research Red High-End Slow-Blow Fuse
    SALE

    Synergistic Research

    Synergistic Research Red High-End Slow-Blow Fuse - Special Offer - Black November Deal

    SKU: SR Red Slow-Blow

    From
    £41.62 £58.32
    Ex. VAT ✓ Save £16.70

    Synergistic Research Red Fuses employ a specially developed burn wire selected in blind listening tests for its ability to improve sound. Next they treat the fuse with a proprietary conditioning process followed by 1,000,000 volts of electricity in a process they call Quantum Tunneling that affects how electricity travels along the fuse for an unmistakable improvement in sound quality.

     

    View Available Worldwide Shipping Available
  • QSA

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

    SKU: QSA Red Slow

    From
    £1,166.67
    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 Red fuse is a step change from the Orange. At the beginning of the high-end range, we believe that it can deliver upgrades to your sound that can match far more expensive cables and equipment.

    View Available Worldwide Shipping Available
  • Synergistic Research Black High-End Fast-Blow Fuse
    SALE

    Synergistic Research

    Synergistic Research Black High-End Fast-Blow Fuse - Special Offer

    SKU: SR Black Fast-Blow

    (2 reviews)
    From
    £49.99 £74.96
    Ex. VAT ✓ Save £24.97

    The new SR Black Fuses encompass Synergistic Research's latest understanding of passive Quantum Inductive Coupling and are their most powerful fuses to date.

     

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  • Synergistic Research Black High-End Slow-Blow Fuse
    SALE

    Synergistic Research

    Synergistic Research Black High-End Slow-Blow Fuse - Special Offer - Black November Deal

    SKU: SR Black Slow-Blow

    (5 reviews)
    From
    £49.96 £74.96
    Ex. VAT ✓ Save £25.00

    The new SR Black Fuses encompass Synergistic Research's latest understanding of passive Quantum Inductive Coupling and are their most powerful fuses to date.

     

    View Available Worldwide Shipping Available

Not finding what you need?
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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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