REL humming issues

[sergekouthon]

Hi,
I'm new to this forum and I'm not familiar with the rules. Approx. 2 years ago, I bought a Lyngdorf MP 60 2.1 sound processor and paired it with an ARCAM PA-720 amplifier. Last year, I replaced my old Cabasse Eole 2.1 with five Cabasse (Baltic 5) speakers. Lately, I've bought two REL T 9/x subwoofers and two REL Bassline blue cables to address the lack of subwoofers. I've attached them to my ARCAM and followed the REL recommendations. I followed the guidance provided by REL into resolve the humming noise issue. I bought two male RCA connectors to link the REL T/9 x LFE entries of each subwoofer to the RCA entries of my Lyngdorf (entries 6 and 8 of the MP 60 User Manual). I am still experiencing residual humming and I am yet to find a solution to this issue. Tell me the best approach to follow.

 

[jjbomber]

Welcome to the forum.

Try this first:

https://relsupport.zendesk.com/hc/en-us/articles/115004649588-How-do-I-stop-my-subwoofer-from-humming

 

[sergekouthon]

Hello,

Thanks for your prompt reply.
I did try, unfortunately : I bought two male RCA connectors to link the REL T/9 x LFE entries of each subwoofer to the RCA entries of my Lyngdorf (entries 6 and 8 of the MP 60 User Manual). I am still experiencing residual humming and I am yet to find a solution to this issue.

 

[Covenanter]

Humming is usually a symptom of an "earth loop" (ground loop). You get an "earth loop" when one or more components aren't properly connected to the same earth. This can be just a loose wire or if the connections are soldered to a "dry joint" - a joint where the solder isn't electrically connecting.

Go through every single connection and redo them.

 

[Al ears]

Humming is usually a symptom of an "earth loop" (ground loop). You get an "earth loop" when one or more components aren't properly connected to the same earth. This can be just a loose wire or if the connections are soldered to a "dry joint" - a joint where the solder isn't electrically connecting.

Go through every single connection and redo them.

Perhaps another issue created by overcomplicating matters like having two subs when one should be perfectly adequate?

 

[jjbomber]

Tell me the best approach to follow.

If you're in the UK, you can phone REL direct, 01656-768777. They have a brilliant customer services department.