Hi all I just got an old JVC subwoofer SXPW860 that works great BUT the problem is that when I connect the speaker wire to the white rca plug it starts to hum/buzz when my bluray is off but the moment that I turn on my bluray the hum/buz stops no hum or buzz whatsoever. Could this be a ground loop? The sub doesn't have an on/off switch so it just stays on because of the hum/buzz (like there's still a signal in the speaker wire even though the bluray is off). So today I will try to plug the same power plug to the same bluray plug and see if this ground loop goes away. The sub doesn't have any speaker terminals as input it only has rca as input and I'm using the white (mono) input to connect the speaker wire from my bluray. My bluray is an LG home theatre with built in audio amplifier and it's all speaker terminals no rca outputs and no dedicated subwoofer rca output. Any help with this would be welcomed!!!!! THANKS!!!