I’m new to Naim and new to this forum, apologies If I’m covering familiar territory - I have had a search and although a lot of you have experienced hum I can’t find a solution to my problem.
I have a NAC92 and NAP140 (I got the NAP140 yesterday, it looks to be in amazing condition), these are connected using a Naim type third party cable. The NAC is connected to a Sonos Connect with a Naim type third party cable.
With all devices connected, when I switch on power there’s a pop and then about ten seconds of loud hum/fuzz before silence - I can then play music and the system sounds great. When I switch off the system there’s a pop and then another period of hum/fuzz before silence. Oh, also and maybe related, the green illuminated Naim logo on the NAC flickers intermittently and seems to have got dimmer.
So, I’ve tried a few things:
I’ve disconnected the Sonos, there’s still a hum when switching on or off but not as loud.
I’ve disconnected the NAC from the NAP, there’s a very slight hum but this seems okay.
So, I think my problem lies either with the interconnect cables (I can return these and get Naim cables) or with the NAC more difficult to resolve as the item came from eBay.
Am I missing anything? Any advice? Any thoughts?