So , I have just blown the fuse on my XPS-2 , there is a large house building development at the end of my street it might be a factor . Will be visiting my Naim dealer in the morning for a new fuse and have read and noted the fuse requirement as printed on the back of the XPS-2 . Hopefully that will fix things .
The XPS-2 is powering a Naim Dac .
My question is .
Please remind me what is the correct sequence for powering up the Naim dac and XPS-2 and also to power down ?
Should I pause between each for a few seconds .
Thanks .
The XPS2 has always been know to blow fuses on power on, now and again.
I believe the decision, guided by sound quality differences, was to allow the in-rush current, rather than use any method to limit it.
I suppose the idea was that any current limiting may also limit dynamic ability.
Regarding powering devices on, I would say best practice is to always wait a few seconds between components.
There should be a spare inside the fuse holder as well, did you check?
The XPS is renowned for blowing fuses unfortunately so probably not your fault, or the power up sequence. When I had the arrangement you have I used to power nDAC first then XPS. If you have just turned of the XPS or the power button doesn’t quite latch I would wait a few minutes before trying again.
I think that may be the issue , the switch had not quite latched and I pressed it again
Thanks fellers ,
You have put my mind at rest .
There is a space for a spare fuse just found it , but it’s empty . I have ordered two from Tom Tom audio and e-mailed my local dealer who i shall visit in the morning
Good to have several fuses for the XPS 2…
Yes ! A fuse holder with room for a spare tells it’s own story . Bought it second-hand a few weeks ago and really enjoying it . Had read here that it would pop fuses still came as a surprise when it did . My Olive XPS was as good as gold for well over a year also on the Naim Dac XPS-2 has just a little more weight .
Interesting thread. My recapped XPS Olive, which I bought a few months ago from a dealer, didn’t blow a fuse when I turned it on. But when I turned on the system after an absence of several days, the house fuse has already interrupted the power twice. This never happened before I had the XPS. I don’t know if it’s the same effect.
Both my 250 DR and XPSDR, when I had them, had the ability to trip the house fuse box. Mains voltage measures quite high in my house, so there isn’t much tolerance left!
The large toroidal transformers Naim use create a huge inrush current, and it’s not unusual for this to trip the breaker that protects the power circuit it uses.
There are different types of breaker, and the one most commonly used is type B. Changing to a type C breaker should prevent this nuisance tripping. This in turn can reduce the number of fuses you blow, especially on the XPS.
Thank you @ChrisSU very much for your answer. It helps me and I am glad that the XPS is not defective (it is still under warranty after the recapping). I have dedicated mains with Doepke residual current circuit breaker and Hager MBN 013 circuit braker (13 Ampere as prescribed by law in Switzerland). I don’t know exactly what a change to type C means…?
Hi, is it the Hager 13 Amp breaker that tripped? It appears to be type B as is has B13 written on it. If tripping is a problem you could ask an electrician if they would change it for a type C if permitted by your local electrical safety regulations. This should greatly reduce the likelihood of tripping when there is no fault, as caused by switching on your XPS as it would take a higher current to trip the breaker.
A Naim system I owned some years ago used to trip the breaker almost every time I switched it on. It was Naim who recommended that I had a type C breaker fitted, and after that it never tripped again when switching on the system.