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

43 of 43 products

  • Synergistic Research

    Synergistic Research Pink High-End UK 13A Fuse

    SKU: SR Pink UK Mains Fuse

    (5 reviews)
    £208.29
    Ex. VAT

    Investing in the Synergistic Research Pink Fuse promises to revolutionise your audio experience with its cutting-edge technology and years of research behind it, delivering unparalleled performance and elevating your system's sound quality to new heights. With its unique combination of the latest UEF compound and high voltage conditioning process, originally developed for a flagship product yet to be unveiled, the Pink Fuse offers enhanced resolution, dynamics, and musicality while maintaining the warmth of the Purple fuse, making it a game-changer in the realm of audio fuses.

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  • Connected Fidelity

    Connected Fidelity CF UK Mains Fuses - Pack of 3

    SKU: C-FA

    (3 reviews)
    From
    £45.79
    Ex. VAT
    Upgrade your audio system with CF FUSES audio-grade mains fuses designed to improve energy propagation and reduce power disruption. With cryogenic treatment, resonance damping, and enhanced conductivity, they deliver better sound for less. Available in UK plug
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  • Connected Fidelity

    Connected Fidelity CF Slow-Blow Fuse

    SKU: Connected Fidelity CF Slow-Blow Fuse

    From
    £16.62
    Ex. VAT
    Upgrade your audio system with CF FUSES audio-grade mains fuses designed to improve energy propagation and reduce power disruption. With cryogenic treatment, resonance damping, and enhanced conductivity, they deliver better sound for less.
    View Available Worldwide Shipping Available
  • Synergistic Research Blue High-End Slow-Blow Fuse
    SALE

    Synergistic Research

    Synergistic Research Blue High-End Slow-Blow Fuse 12.5A 250V Ex-Demo

    SKU: SR Blue Slow-Blow-7

    £92.50 £108.33
    Ex. VAT ✓ Save £15.83

    The revolutionary new SR BLUE Quantum Fuse was developed over a two year period and represents Synergistic Research's most advanced UEF Technology to date. At its heart is a completely new UEF / Graphene coating that delivers a dramatic increase in resolution and holographic realism over SR Black. And thanks to a new conditioning process, break-in time is cut in half.

     

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  • HiFi TUNiNG

    HiFi TUNiNG UK-Supreme 3 Copper Mains Fuse - 13A

    SKU: Supreme 3 Copper

    £66.62
    Ex. VAT

    One of the standout features of the "Supreme" fuse is its use of Cardas Low Eddy Copper. This copper is applied to both the end caps, and the internal melting wire. Not only does this result in increased speed, dynamics, and clarity, but it also ensures long-term performance without the worry of oxidation and degradation.

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  • Synergistic Research

    Synergistic Research Holographic High-End UK 13A Fuse

    SKU: SR-HOLO-13

    £208.33
    Ex. VAT
    The Synergistic Research Holographic Fuse uses a new UEF metamaterial developed for the Quark streamer to widen a system's soundstage and add spatial depth without introducing edge or fatigue.
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  • Synergistic Research Pink High-End Slow-Blow Fuse
    NEW

    Synergistic Research

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

    SKU: SR Pink Slow-Blow Special Offer

    From
    £166.62 £208.29
    Ex. VAT ✓ Save £41.67

    Investing in the Synergistic Research Pink High-End Slow-Blow Fuse promises to revolutionise your audio experience with its cutting-edge technology and years of research behind it, delivering unparalleled performance and elevating your system's sound quality to new heights. With its unique combination of the latest UEF compound and high voltage conditioning process, originally developed for a flagship product yet to be unveiled, the Pink Fuse offers enhanced resolution, dynamics, and musicality while maintaining the warmth of the Purple fuse, making it a game-changer in the realm of audio fuses.

    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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