REL Sub Hum


Hi Folks, looking to see what the issue could be. I'm hearing a substantially loud hum coming from the REL T5/I sub when connected to the Parasound A23 power amp. The other two amps have no issues... what is a power amp would cause this issue? 

REL subwoofer is connecting using speakon cable... I have not tried LFE/.1 to see if the issue persists.... 

mullster

@audiotroy appreciate the suggestion - what I did test is getting all the equipment on the same extension cord. With your suggestion, how would one test for whether there is a ground loop? Am I plugging in anything to the extension cord? 

What is interesting is that the EXACT same configuration works fine w/o for the other parasound amp. 

@willywonka yes I did after Mr. Hunter's latest video, which did not address the issue! Power cable goes off to one side of the REL and the speakon to the other.... 

@blackbag20 - interestingly, hum fairly loud and constant... does not change with volume.... does that narrow down anything?