Connected my Denon AVR-X2700H up to my SN3 via RCA last week and now have a dreaded hum when using AV input. Bypass enabled and I also tried james_n’s solution of cable wrapped around a DIN socket and then attached to ground but still no joy (TT is also connected to ground).
Not sure where to go next, any suggestions gratefully received.
If the extra ground wire is not working then it sound like you have a ground loop being created when you attach the AVR to the SN3. Try one of these between the AVR and SN3.
Yep, hum only on AV input. If I disconnect at SN3 end the hum disappears. Only kit connected in NDX2 and LP12, nothing else. Signal ground is set to default on the NDX2.
I’d look for something from QED or Chord C line. I’d see if you can borrow a cable from your dealer (or at least get on sale or return if Internet based) just incase. Connecting AV to Naim kit can sometimes be a bit hit and miss so it may be a bit of trial and error here.
Aye, I had a chat with him last week and he said much the same thing and was pretty much a case of eliminating one thing at a time to see where the root cause is. The hum isn’t actually that bad but it’s there. And annoying.
I’ll order another cable off Amazon and see how it goes. Thanks for your help so far though, appreciated.
Well at least it’s only on the AV side so it’s not affecting the music side. Still, it’s good to get to the bottom of these things and hopefully fix the issue. Report back when you get the new cable and don’t send the Isolator back just yet…
Apologies, if you’ve already tried but have you flicked switch on the back of the NDX2 to “floating” from default?
I have same AV amplifier on av bypass to a Naim amp with no hum.
Good luck.
Does your Denon have a 2 pin European power cable with the European plug convertor fitted? Im having similar problems with a Denon AVR-X6500H humming and a kind of electrical buzzing. Its the same as you , it only happens using the AV input.
Standard UK plug. I just bought a higher quality shielded RCA cable and made sure it wasn’t touching anything - problem solved. Can’t offer you more than that I’m afraid, sorry.