I have a JBL Subwoofer (PSW-1000) connected to my Yamaha receiver using a high-end MIT Terminator series 5 (10-ft RCA) cable. The problem is that when you touch the cable at the receiver's end, the sub hums, and stops the moment you let go. The receiver is on a surge protector along with the rest of the components, the sub is connected to the wall. Let me flash back to this problem's past. The problem was so severe that if you touched the sub's metal plate, the receiver's metal case (including the aluminum front) plus the cable the hum started. Sometime it remained even if you stopped touching it. I disconnected everything and the sub hummed if you touched the cable at the opposite end (the receiver's). I rerouted all my cables, video with video, digital with digital, analog with analog all separately, and power cords isolated together from the interconnects (all my interconnects are Monster and MIT). And I went further and isolated the sub's MIT cable from the rest. The problem was gone to the point that I forgot about it. Until today that it happened all the sudden without touching anything, just listening to music. Only this time it's very hard to make the hum show up except by touching the sub's cable at the receiver's end wether connected or not (now, touching the receiver yields nothing, only the sub's metal plate -not always- and the cable at the receiver's end -always-). I do not have cheater plugs, my surge protector is properly grounded with the three-prong plugs, and the sub, as I said, does not have a protector, neither does it have a three prong-plug by default. What are my options here? What should I do? Do I have a ground problem? Do I need to put the sub to a surge regulator as the rest? I know the receiver or anything else in the system is not the problem, so, How do I fix this? wait a minute, let me say that again correctly: How do I fix this, cheap? Ha ha ha. Thanks folks, thanks in advance. P.S. BTW I already have searched my ass off in this forum for topics related, so don't bother, I have a lot of material but no clue.