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Mains Plug Fuses for Naim 300/300PS

Discussion in 'classic' started by PaulJ, Mar 2, 2023.

  1. PaulJ

    PaulJ pfm Member


    I would like to know what amp fuse I should use for Naim 300DR & 300PS, I don't have original leads currently. I am also a bit weary of buying cheap chinese fuses, I would be grateful of advice please

  2. Funk

    Funk pfm Member

    The manual says this:

    "2. Mains Power Use only the mains leads and plugs supplied or the Naim PowerLine mains cable. Where fused plugs are used 13 amp fuses should be fitted. Fuses of a lower rating will fail after a period of use. Do not wire voltage dependent resistors or noise suppressors into mains plugs. They degrade the mains supply and the sound." Amplifiers Reference English Issue 2B.pdf Page 3.

    A standard 13A fuse from a hardware store should do the job perfectly?
    MikeMA, TheFlash, narabdela and 3 others like this.
  3. rhgbristol

    rhgbristol pfm Member

    As above….

    Standard BS 1362 (plug type fuse), rated at 13A to withstand the switch on inrush current, and in any case in line with Naim’s recommendations.

    Go for a decent make like Bussmann, and make sure it’s ASTA approved.

    Avoid any unbranded fuses and absolutely no need for any boutique grade fuse.

    We’re talking pennies here, not pounds !
    martin clark, gavreid and chartz like this.
  4. chartz

    chartz If it’s broke fix it!

    Naim amps (or any other gear for that matter) don’t need any special fuses, or power cables. Just don’t buy your fuses on Aliexpress ;)
    MikeMA, John H, Funk and 2 others like this.
  5. Wenger

    Wenger Well-Known Member sell audio level fuses, worth asking them
  6. narabdela

    narabdela who?

    They'll welcome you with open arms. :rolleyes:
    kernow, booja30, MikeMA and 1 other person like this.
  7. Martin69

    Martin69 Member

    It's a plug top mains fuse for crying out loud, get some the next time you go to the supermarket. Neither you nor anyone else can tell any difference between brands with your ears.
    Last edited: Mar 26, 2023
  8. MikeMA

    MikeMA pfm Member

    What is an audio level fuse please?
    Barrymagrec and booja30 like this.
  9. suzywong

    suzywong Wot, no electrons?

    Amusingly there’s a discussion running on the green forum on this very subject. And the flavour of the month among the golden-eared cognoscenti is……

    ……Bussmann 13A, bought in packs of 10 from Amazon!
    Last edited: Mar 27, 2023
    narabdela likes this.
  10. narabdela

    narabdela who?

    A fuse with an obscene mark-up.
    Last edited: Mar 26, 2023
    TheFlash likes this.
  11. Craig B

    Craig B Re:trophile

    Ah, yes, those Bussmann 13A exhibit an almost tactile sense of pace, rhythm, and timing, that is, up until they blow, whereupon there exists a deep, inky black silence.
    booja30, MikeMA, suzywong and 2 others like this.
  12. suzywong

    suzywong Wot, no electrons?

    But, apparently, they need to be be installed the right way round in the plug for enhanced sonic goodness.

    On a more serious note though, there was in the same thread, some discussion about counterfeit fuses, and how to identify them.
  13. awkwardbydesign

    awkwardbydesign Officially Awesome

    Don't. Some of the cheap ones aren't even soldered, just pressed, so something like Bussmans would be a better bet. They are still cheap.
    kernow likes this.
  14. Martin69

    Martin69 Member

    Bussman are just one of a large number of fuse manufacturers who all make fuses to BS1362, you really don't need Bussman specifically and whatever your local supermarket has stocked will be perfectly safe. Where I would urge caution is buying from the net where the origin of products is not obvious or deliberately designed to mislead. Other than that specific source I think you would struggle to buy a non compliant fuse in a high street retail outlet.
    TheFlash and booja30 like this.
  15. daytona600

    daytona600 Registered User

  16. Martin69

    Martin69 Member

    What a load of b*ll*cks (bottle neck distortion my ar*e) and nary a mention of a British Standard. Mind you if anyone is stupid enough, and I regretfully suppose there are some, to spend that amount of money on a fuse then they deserve everything that comes to them.
    narabdela likes this.
  17. Craig B

    Craig B Re:trophile

    You obviously failed to scroll down to the "You might also be interested in" section where one will invariably find the following...

    Quantum Science Audio Gold Extreme Level
    UK Mains Fuse (13A)

    £6,666.67 excl. VAT
    Item Code: QSA Gold UK

    Perhaps this should simply be referred to as the "£8K a pop model"?
    TheFlash and kensalriser like this.
  18. daytona600

    daytona600 Registered User

    Made my own bashed out a 1inch section from gold Krugerrand to fit inside the plug
    booja30 likes this.
  19. herb

    herb brain's right hemisphere

    Cheap 13amp Bussmann fuses good. Cheap 13amp Marbo fuses bad and restrictive IME after destructive analysis of a Naim powerline. (clean the end plugs though):cool:
  20. hifi-dog

    hifi-dog pfm Member

    @PaulJ -i bought a pack of 10 bussmanns form amazon -got 8 left, pm your address and ill pop a couple in the post
    Martin69 likes this.

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