Naim 500DR fuse
- Thread starter gagahoo
- Start date
daytona600
Registered User
See end cap of fuse
eg T5/250
T= time delay
5 = 5amps
250 = 250volts
5x20mm or 6x32mm common sizes
glass or ceramic body
10pence or Foo super duper £1400
eg T5/250
T= time delay
5 = 5amps
250 = 250volts
5x20mm or 6x32mm common sizes
glass or ceramic body
10pence or Foo super duper £1400
Amber Audio
This is the Day
Tom Tom Audio or Cymbiosis
tomtomaudio.co.uk
£1.50
www.cymbiosis.com
Naim Audio - Tom Tom Audio
Tom Tom Audio is the UK's number one dealer of Naim Audio preloved and new hifi equipment, and a premier stockist of Rega, Neat Acoustics and Focus products
tomtomaudio.co.uk
£1.50
Naim Antisurge Glass Fuse T3.15AL250V (Single) HDX / Uniti / Supernait / Nap200 / Nap250 / Nap300 / Nap500 / 555PS / 552PS - Cymbiosis
Naim Antisurge Glass Fuse T3.15A 250V (Single) For use with HDX/Uniti/Supernait/Nap200/Nap250/Nap300/Nap500/555PS/552PS/Hicap DR 06-002-0012
Amber Audio
This is the Day
They blow regularly and it’s a pita, had two blow on my 300 and one on my 500. Neighbour has a 300, his blew earlier this year, gave him the spares I had as I am no longer using any Naim gear.
narabdela
who?
Wrong question! You should be trying to find out why the fuse is blowing. It's nothing to do with the quality of the fuse.
simon g
Older, wiser but no longer retired
What do you mean; better? I suggest that you replace with exactly the part that Naim fitted. If it blows again then you need to get the amp looked at.
Your comment on 'full volume' is also worrying. 'Full volume' may well be the root cause here. I would never, ever, run my system at full volume. It's just asking for trouble and damaged hearing, to boot.
Amber Audio
This is the Day
Have you used the spare one that’s in the fuse holder at the back?
Paul Hindle
Do you mock me?
They are “Slow blow” fuses. They do blow every now and again for no apparent reason. It’s not just Naim gear. 
They are “Slow blow” fuses. They do blow every now and again for no apparent reason. It’s not just Naim gear.
I'm Amber Audio's neighbour and the happy recipient of his spare fuses!. My 300 DR doesn't seem to like being switched on from cold - despite having its power switch on the front ( old Naim theory was that if the amp was meant to be left on the power switch was a rocker on the rear) - but the current on-rush can sometimes lead to the slow blow fuse going. It's never happened when in operation.
Like many Naim users I leave the amp on unless going away on holiday.
It's a pain when you come back though as there's a jeopardy moment on switch on...
I gather Naim have addressed this problem with newer amps having a different switch on circuit design.
I did say almost full volume , not full. The amp should hande it espcially if you fed it low db from the dac.
what I meant by better fuse, Ridiculously expensive, is as some suggest it will enhance the the music quality.
I did pinch one from my 300dr . I was not sure if both use the same fuse but will do for now.
what I meant by better fuse, Ridiculously expensive, is as some suggest it will enhance the the music quality.
I did pinch one from my 300dr . I was not sure if both use the same fuse but will do for now.
herb
brain's right hemisphere
My first CDX2 blew a fuse half the times I switched it on from cold. The replacement a dealer gave me blew instantly. The answer was to use a Littelfuse supplied by TomTom Audio as mentioned above. I got a spare but never used it, the problem never recurred as I rarely switched the CDX2 off as recommended by Naim.
Paul Hindle
Do you mock me?
Yeah, Naim now incorporate a soft start module into the new products. Problem gone.