Hi.
I know this question might have been asked a number of times and I tried to understand the answers for different scenarios, but, still couldn't figure out what to do.
Here is my problem. I bought two HSU VTF2-MK3 subwoofers a month ago and I hooked up only one. I noticed that sometimes the sub would give a humming noise eventhough there isn't anything playing.
Anyway, once I tried moving the sub cable away from some power cord, the hum would go away.
Today I hooked up another sub almost 20 ft away. And soon as the sub cable touches the y-adaptor, the hum is unbearable ( I set the volume on both the subs to 1/2). So, I thought the sub is getting interference from some power cable, so, I unplugged the power from the single power conditioner, and tried connecting the sub. The hum is STILL there. I think from the threads I have read, some of the outlets are not grounded. But, I don't know what and how to do something about it.
By the way, the first sub is a feet away from the receiver and the second sub (which I tried hooking up today) is almost 17 ft out connected by probably a 35 ft monoprice RCA cable.
Please help.