I just received the new Nap 250. On the left speaker there’s a hum that I can hear from 3m. Not loud but present. On the right speaker there’s like an electronic buzz that I perceive when I put my ear.
I suspect there’s a problem.
Is it safe to listen to music for now ?
have you tried swapping the xlr cables round to see if the hum in one speaker follows the cable? that would be easier if its a cable fault, that will show you if it is
With the input leads unplugged from the 250, it should be perfectly silent. So this unit is certainly faulty I think. Very unfortunate, but it needs to go back for replacement by one that has been built properly imho.
If it’s that, I hope my dealer will borrow me his NC 250 , till the new one arrives.
It may be the 250, or a default of the XLR cable.
If a different NC 250 still doesn’t work and a different cable too, even an XLR to RCA, I will see no other solution.
But better hope for now and proceed step by step.
Yes, if I reverse the XLR cables , the hum goes to the other speaker.
And the other speaker has a little electronic noise . Both are affected, but differently.
Hopefully, it is the cable. I would discount your preamp coincidentally developing a fault at the same time you have installed a new power amplifier. Up to your dealer most definitely.