Connected Fidelity Fuses


The fuse: Through extensive listening tests, they have discovered that there are several ways of improving the fuse ‘performance’ for audio and A/V use

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connected fidelity

CF Fuses

CF Fuses


Straight talking about mains power fuses for audio and A/V.

It is now understood that electrons do not ‘flow’ like water, but rather they ‘propagate’ in a wave of energy that moves along the electrons in the atoms that make up the conductor wire, at the speed of light.

CF Fuses and fuse holders are a part of that conductor, its imperative to ensure good electrical propagation through these component parts.

The fuse wire and connections between it and the cables on both sides form a link in your mains power supply to each piece of equipment in your audio or A/V system.

Connected-fidelity™ mains power fuses have been developed to minimise power propagation issues.

No fancy rare earth materials or expensive plating finishes are required in their opinion, these certainly increase the price and look lovely, but the fuse will ultimately be fitted into a relatively low-quality commercial grade fuse holder as most are made from a bronze alloy with a Tin or Nickel electro-plated finish, except in higher quality audiophile plugs and equipment, and even the best of these are not perfect connectors.

They have concentrated on what is important

Reducing the impact both the fuse and holder together have on power propagation though these connected components.

The fuse: Through extensive listening tests, They discovered that there are several ways of improving the fuse ‘performance’ for audio and A/V use.


A deep cryogenic treatment (extended soaking of the fuse at a temperature close to absolute zero) cold anneals conductive metal materials and better bonds the silver alloy fuse wire to the copper fuse end caps at a molecular level, also improving the conductivity of both silver alloy fuse wire and copper connecting ends.


Adding a resonance damping sleeve over the ceramic fuse case for increased mechanical isolation.


Applying an exceedingly high voltage (400,000V with minute amperage) through the fuse does more than simply ‘run in’ the fuse. They are into the realm of quantum mechanics here, and whilst other fuse brands do this as their sole improvement technique there is no real science to back it up, it just seems to work.


Finally, the application of a conductor cleaning agent to the fuse caps and mating parts of the fuse holder immediately before fitting. They supply a cleaning cloth with every box of connected-fidelity™ fuses, to remove dirt, grease, and oxidisation from both the fuse and the fuse holder conductive surfaces.

Excellent value

There has been little precise science involved, they worked with their ears to achieve an excellent result that does not ‘break the bank’.

They supply the CF fuses in 3’s because you should use them in every audio or A/V component and a ‘multi-pack’ is best value.

Noticeable performance gain

Indeed, they are very low-cost compared to many of the other audio quality fuse brands available and we find they offer improved performance, particularly powering source components like phono-stages, CD players and streamers; along with pre-amplifiers, power amplifiers and A/V equipment.

CF Fuse Specifications

CF13A and CF5A Audiophile fuses for UK plugs.

  • Full British Standard approval
  • 5 amp and 13 amp fuse ratings available
  • Silver alloy fuse wire held in ‘anti-shock’ filler.
  • Thick ceramic body
  • Anti-resonance sleeve over body
  • Copper end-caps, polished nickel plated.
  • Deep Cryogenic treatment
  • Ultra-high voltage treatment
  • Boxed in 3’s
  • Complete with cleaning cloth
CF Fuses Cleaning

For Audio

  • Fuller sound quality
  • More dynamics
  • Better sound staging

For Picture

  • Clearer picture definition
  • Deeper colours, blacker blacks


Additional information


13 Amp, 5 amp


Connected Fidelity

Connected Fidelity Michael Osborn, designer, engineer, manufacturer, and lifelong music lover, has been working in the Hi-Fi industry for over 30 years. He initially designed and launched the Astin Trew brand audio electronics ranges, then moved into audio products Distribution, introducing brands such as Astell n Kern and Hana cartridges to the UK during his long and successful career in the audio industry. As an inveterate designer and maker, Michael has throughout his career continued to design and develop products for his own use when nothing in the market fitted his sense of what makes music in the home sound so good and ended up selling these products to fellow audiophiles in an ad-hoc way mostly through word of mouth. He has also helped fellow audiophiles develop products they were working on and will be launching some of these through connected-fidelity™ when they fulfil a need in the market and pass the connected-fidelity™ sound-quality seal of approval!

So, connected-fidelity™ is the brand that now offers these fine products to everyone.

Connected-fidelity ™ products all do one thing.

They make the experience of listening to recorded or streamed music in the home more enjoyable by bringing you closer to the actual music.

This might seem like a simple and obvious statement, but the reality is not easy to achieve.

All the products have taken many long hours of development to get right, both sound-wise and price-wise, numerous development samples, research into materials and processes, long hours of comparison listening tests.

Connected-fidelity ™ is not shy about talking about the how and why.

Clearly there are some processing and manufacturing ‘secrets’ that are not disclosed for commercial reasons but are as open as possible about how the products are made – and the manufacture is in the UK.

connected fidelity


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