Just installed my new Node Icon - getting hum through XLR connectors; some sort of ground loop problem?

Beantwortet

Peter Korn

• 25. Dezember 2024 22:52

I just installed a brand new Node Icon, replacing an old Logitech Transporter and Krell KRC-3 pre-amp (which I'd also like to stop using), making the Icon the "volume knob".  I'm using the XLR connections to go directly into an Apogee Mini-Grand DAX (one of the reasons I went with the Icon - for the XLR), and from there to a pair of Krell amps, which in turn drive my speakers (Apogee Mini-Grand).  Cables came over from a previous system, and are known to be good (no hum there); also swapped them out for completely different sets, no problem.

I'm getting a hum through the Stages when wired directly to the DAX.  When I put the Krell KRC-3 pre-amp back into the audio path, the hum goes away.  Is this ground loop problem?  Could this be a bum Icon?  

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• Offizieller Kommentar

  

  Seppi Evans

  Hi-Res

  • 26. Dezember 2024 11:04

  Hi, I am just another user but if the ICON is working directly with the Krell Pre (and to the Kell amps) with the Apogee removed it would either point to an incompatibility / fault with the Apogee or as you say a ground loop introduced rather than a “bum” ICON.

  Best to contact Bluesound Support via the BluOS App for further assistance.

  You could try a an odd piece of wire and ground the Apogee, personally I would probably be looking to drop the Apogee and the Krell pre (which you are already planning to do) and then any audio room tweaking / filtering would be done using DIRAC on the ICON when it gets released making for a much simpler system.
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  Peter Korn

  • 26. Dezember 2024 20:43

  Thanks Seppi, but I think I may have not been clear about my setup.  Original setup was Logitech Transporter to Krell preamp to Apogee DAX to two sets of Krell amps and then finally to the Apogee speakers.  I tried to take both the Transporter and the Krell pre-amp out of the picture, connecting the ICON to the Apogee Dax, which is where I heard the hum.  I had to re-insert the Krell preamp to remove the hum.  I can't remove the Apogee Dax without replacing it with some other crossover component.

  I'll reach out to Bluesound Support, to see if they have any suggestion.

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