Had the humm from day 1 when I received my SVS/Samson. Disconnected my Cable and sure enough, the humm went away. At first I thought that the Rat Shack Ground Loop Isolator had solved my humm problem. Now, when I turn on my amplifier (Samson 700) there will be usually be no humm at all. But about 30 minutes into a movie I'll start to hear a faint humm from my SVS 2039CSi. After about another 15 minutes or so, the gets louder and then louder. If I turn off the amp for a minute and then restart it, sometimes the humm will either go away, or the humm may be reduced a bit. About 10% of the time, I can go through a whole movie without hearing any humm. Any thoughts? My equipment: Denon 3802 Samson 700 SVS 2039 CSi ART 351 EQ Mits 65908 RPTV Thanks for any assistance.