I have been away from Naim for sometime but have decided to replace a Norma Audio integrated with a Supernait 3. Unfortunately, as soon as the SN3 is turned on and the mute turns off, there is an audible hum coming from the speakers. I have the power cord from the SN3 plugged into a wire mold power strip. The hum is there whether it’s plugged into that or directly into the wall. I have unplugged all sources and the hum is still there.
Even though I literally set it up today, I can tell the sound is better than the Norma but I can’t deal with the hum. I unplugged the SN3 and reinstalled the Norma, and no more background hum. As I recall, when I had a Nait 2 and Kan IIs, there was a faint hum but you had to put your ears to the speaker to hear it. This one I can hear from over 10 ft away.
I have to clarify that the hum goes away with all the sources removed from the SN3. As soon as the interconnects are connect to the back, the hum returns. Pulls the SN3 and put the Norma back in and it is silent even when turned up all the way.
I have an Oppo BPD83 for CD source and the new BlueSound Node for streamer. I’ll look into the ground loop hum. Seems strange to me that the Norma doesn’t have the problem but the SN3 does.
hello, what speaker cables do you use? i had the same problem with my sn2. I was using audioquest Rocket 88s and they made the speakers hum. Changed the cables with telluriums and the hum is gone.
before naim i used primare and no problem
I think you’re right. I unplugged the Oppo Bluray player from both the power strip and disconnected the audio connects. I also realized that I had the HDMI from my Sony TV going into the Node. After removing that from the Node, there is no more hum with just the node connected to the Nait via RCA cables. Both the SN3 and Node are plugged into a powerstrip going to a single outlet.
The HDMI use is only temporary until I get an AV receiver and setup for surround. This is a shame because this was not an issue with the Norma. At this point, I can’t use the Oppo as a CD player ( it is not connected to the TV to be used as a blu ray player at this time) and I can’t output TV sound and listen to it via my floor standers.
Connect a cable from the metal chassis of the Oppo to a known earth point, such as the earth pin of a UK 3-pin plug, or even the screw holding the socket to the wall, as these should be earthed too.
I’ve done on a few friends systems which showed the same symptoms as yours.
If you’re not in the UK, check your local legislation for earth / ground points.